AC Circuits
Compare R, RC, RL, and RLC circuits: phase, impedance, resonance.
LaunchAll Simulations
Choose simulations in physics, chemistry, biology, and math and start a lesson in minutes
Adsorption and Surface Purification
Explore how filters work! Add activated carbon to polluted water and watch how its porous surface absorbs harmful molecules.
LaunchAlcohols, Aldehydes and Carboxylic Acids
Follow oxidation alcohol → aldehyde → carboxylic acid and compare functional groups.
LaunchAlgebraic Fractions: Domain, Reduction, Operations
Find the domain, cancel factors, convert to a common denominator, and discard extraneous roots.
LaunchAlgebraic Identities by Area
Build squares and rectangles to see why (a+b)², (a-b)², and a²-b² work.
LaunchAlkenes, Alkynes and Arenes
Compare addition vs substitution and see why benzene prefers substitution.
LaunchAmino Acids and Proteins
Build a protein molecule! Connect amino acids with peptide bonds and observe the formation of a long polymer chain, the basis of all life.
LaunchAngles and Protractor
Learn to measure the world in degrees! Estimate angles by eye, use a virtual protractor, and construct specific angles with high precision.
LaunchAnimal Classification
Explore the animal kingdom. Compare vertebrates and invertebrates, identify classes by key traits (structure, habitat), and test your knowledge in mini-missions.
LaunchInvertebrate diversity
Compare protozoa to arthropods; parasites and prevention in Kyrgyzstan context.
LaunchApollo Parachute Descent
Ensure a soft landing! Deploy drogue and main parachutes at the right altitude, account for air resistance, and safely splash the capsule into the ocean.
LaunchApollo Re-entry
Control the spacecraft! Adjust the entry angle into Earth's atmosphere so the capsule neither burns up from friction nor skips back into space.
LaunchArtificial Selection: Plants and Animals
Compare tomato and rabbit breeding. Choose parents by inherited traits, produce varied offspring, and stabilize useful qualities over generations.
LaunchAtmospheric Pressure
Recreate Torricelli's experiment, read a barometer and watch pressure fall with altitude in the mountains of Kyrgyzstan.
LaunchAtom, Orbitals and Quantum Numbers
Build the electron shell of any element. Fill s, p, d, and f orbitals according to Hund's and Pauli's rules, exploring the quantum numbers of each electron.
LaunchBacteria, Fungi, and Lichens
Compare bacteria, fungi, and lichens: structure and roles.
LaunchBiosphere, Vernadsky and global cycles
Explore the biosphere, matter fluxes, and consequences of human decisions.
LaunchBiotechnology and genetic engineering
Distinguish PCR, recombinant-DNA assembly, CRISPR-Cas9 and cell culture; trace bioproduct pathways and responsible decisions.
LaunchBlood Circulation and the Heart
Trace the path of blood through the systemic and pulmonary circulatory systems. Study the internal structure of the heart, valve functions, and the transport of oxygen from lungs to organs.
LaunchBohr's Atom and Spectra
Excite the hydrogen atom, watch the electron jump between levels and collect the emission and absorption line spectra.
LaunchBrachistochrone Race
Design the fastest descent and compare it with a straight line, Galileo's arc, and Bernoulli's cycloid.
LaunchRespiratory System and Gas Exchange
Follow the path of air from the trachea to the alveoli. Observe microscopic gas exchange (how O₂ enters the blood and CO₂ leaves) and compare breathing rates at rest and during exercise.
LaunchBuffon's Needle
An amazing way to calculate π! Throw virtual needles onto a lined floor and see how the probability of crossing the lines is related to the famous number.
LaunchBuild a Nucleus
Feel like a creator of elements! Add protons and neutrons to the nucleus, create various isotopes, and test them for radioactive stability.
LaunchBuoyancy
Why don't ships sink? Drop blocks of different volume and mass into water. Compare their densities with the fluid's density and study the buoyant force.
LaunchButlerov Structure Theory and Nomenclature
Connect structure to properties, count simple isomers, and practice systematic names.
LaunchCalorimetry
Heat substances, read Q = cmΔT from live graphs, mix hot and cold water and predict the equilibrium temperature.
LaunchDiversity of Cap Mushrooms
Study cap mushroom structure and key foraging safety rules.
LaunchCapacitor
Charge and discharge a capacitor and explore the RC time constant.
LaunchCarbon, Silicon, Carbonates and Silicates
Compare C and Si, CO₂ / carbonic acid, carbonates and silicate materials.
LaunchCell Structure
Explore the microworld! Look inside a living cell, study the functions of all organelles, and find the key differences between plant and animal cells.
LaunchCell chemistry, organelles and metabolism
Compare four biomolecule classes, cell-type-specific organelles, and pathways for protein secretion, respiration and photosynthesis.
LaunchCharges and Fields
Visualize the invisible! Place electric charges on the screen and observe how electric field lines and equipotential surfaces are formed.
LaunchChemical Bond and Molecular Geometry
Build Lewis structures and 3D shapes with VSEPR. Use NH₃ to explore how nitrogen's lone pair creates a trigonal pyramid and affects polarity.
LaunchChemical Equilibrium
How does a system react to stress? Change concentration, temperature, and pressure to see how chemical equilibrium shifts according to Le Chatelier's principle.
LaunchCircle: Circumference, Inscribed Angles and Tangents
Roll the circle to find π, drag the inscribed angle’s vertex, and check tangents and the cyclic quadrilateral.
LaunchCentripetal Acceleration
Spin the physics carousel! Change the mass, velocity, and orbit radius to understand how they affect centripetal acceleration and the force keeping an object in a circle.
LaunchCollisions in 2D
Move into 2D space! Control balls on a plane, adjust their velocity vectors, and study the conservation of momentum across both X and Y axes simultaneously.
LaunchCollisions in 1D
Study the physics of crashes and billiards. Collide carts on a track and verify how momentum and kinetic energy are conserved in perfectly elastic and inelastic collisions.
LaunchColloids and Dispersed Systems
Classify solutions vs colloids vs suspensions, see the Tyndall effect, and coagulate colloids.
LaunchCombinatorics: Permutations, Arrangements, Combinations
Count outcomes on a decision tree, tell arrangements from combinations, and build Pascal’s triangle.
LaunchComplex Compounds
Become a molecule architect! Select a central ion, attach ligands to it, and create stable complex compounds with desired properties.
LaunchCoordinate Transformations
Play with space! Draw geometric shapes in the Cartesian coordinate system, translate them along axes, rotate, and reflect them across the center or lines.
LaunchCoulomb's Law
Explore electrostatics! Change the magnitude and sign of charges, move them, and observe how the force of attraction or repulsion depends on the square of the distance.
LaunchCovalent Bond
Discover how atoms share electrons! Bring nonmetals together and observe the formation of shared electron pairs to achieve a stable octet.
LaunchCrack the Enigma
Feel like a WWII cryptanalyst. Study the inner workings of the Enigma cipher machine and try to crack the code using cribs (known fragments of text).
LaunchCrystal Lattices
Study the macroworld through microstructure. Compare atomic, molecular, and ionic lattices (diamond, dry ice, salt) and understand why they have different physical properties.
LaunchSphere and Cylinder
Explore 3D geometry. Rotate a sphere inscribed in a cylinder, study their planar cross-sections, and visually prove that their volumes have a 2:3 ratio.
LaunchDecimal Fractions and Place Value
Break numbers down by place, convert common fractions to decimals, find the repeating period, and round.
LaunchThe Definite Integral: Area and Volume
Raise the number of strips and watch the Riemann sum converge: Newton–Leibniz is cross-checked by Simpson’s rule and the volume by a stack of discs.
LaunchDensity of Matter
Measure mass on scales and volume by water displacement, compute density and identify an unknown substance by its density.
LaunchThe Derivative: Tangent, Monotonicity, Extrema
Shrink h and watch the secant settle onto the tangent: the derivative is taken by formula and checked against a numeric test on the spot.
LaunchDiffraction and Polarization
Send light through a diffraction grating, measure the orders and explore Malus' law with rotating polarizers.
LaunchDiffusion of Gases and Liquids
Observe the random motion of molecules. Study how temperature, particle mass, and concentration affect the speed of substance mixing (diffusion).
LaunchDigestion and Enzymes
How does food turn into energy? Explore the anatomy of the digestive tract, the role of pH, and specific enzymes (amylase, pepsin, lipase) in breaking down proteins, fats, and carbohydrates.
LaunchDiscover Neptune!
Become a discoverer! Adjust the mass and orbit of a hypothetical Planet X so that its gravity explains the strange perturbations in Uranus's motion.
LaunchDiscover π
Recreate Newton's historical discovery! Calculate the number π by approximating the area of a quarter circle using binomial expansion and series.
LaunchDivisibility, GCD and LCM
Explore the sieve, divisibility rules, and GCD/LCM with grids and gears.
LaunchDNA
Study the structure of life's most important molecule! Build the second DNA strand using complementarity rules (A-T, G-C), explore codons, and start the process of genetic code replication.
LaunchEco-Balance
Manage a closed biosphere! Maintain the fragile balance of oxygen and carbon dioxide, control species populations, and ensure the survival of the ecosystem.
LaunchEcosystem, food chains and biogeocenosis
Compare food chains and webs, calculate energy transfer, and distinguish matter cycling from energy flow.
LaunchCurrent in Solutions and Faraday’s Law
Explore ionic conduction in liquids and verify Faraday’s law m = k·I·t by depositing copper or silver.
LaunchElectrolysis: What Forms on the Electrodes?
Identify cathode and anode products for salt and acid solutions — the chemistry of redox at electrodes.
LaunchElectromagnetic Spectrum
Match EM bands and link wavelength with frequency and energy.
LaunchHormone loops: signalling and feedback
Compare HPT feedback, glucose regulation and the timed HPA response to acute stress.
LaunchEnergy Track
Create your own skate park! Launch a skater on a ramp and track in real-time how potential energy converts into kinetic energy and is lost to friction.
LaunchEquation Balance Scales
Solve positive linear equations on honest balance scales: equal actions on both sides, equal-group sharing, and substitution check.
LaunchEvolution
Witness the mechanisms of evolution in action. Observe how predators and habitat environments affect the frequency of traits (like color) in a bug population over generations.
LaunchExcretory System and Kidney Function
Trace the path of blood filtration in the kidneys. Study the nephron structure, the process of urine formation, and learn how the body maintains water-salt balance.
LaunchExponential and Logarithmic Functions
Change the base and doubling time, mirror the exponential into a logarithm, add logarithms on a slide rule, and solve exponential equations.
LaunchFirst aid: trauma decisions
Recognise life-threatening bleeding or emergency fracture signs and build a safe CHECK–CALL–CARE sequence.
LaunchFlower, pollination and double fertilization
Trace flower parts, pollination and double fertilization to fruit and seed.
LaunchFluid Flow and Bernoulli
Follow fluid through a narrowing pipe, watch pressure drop where speed rises and generate lift on a wing.
LaunchForces and Motion
Understand Newton's second law. Apply force to objects of different masses, account for friction, and observe how the body's acceleration and velocity change.
LaunchFractions
Add fractions visually! Divide a pizza or chocolate bar into equal parts and find their exact position on the number line.
LaunchFunction Graph Transformations
How do you get any function from a basic one? Learn the rules of mathematical transformations: translations, stretchings, compressions, and reflections of graphs.
LaunchGas Laws
Control pressure, volume, and temperature! Compress the piston, heat the gas, and watch the molecules move to understand the macroscopic properties of a gas.
LaunchThe Gauging Bench
Gauge historical wine barrels with one diagonal rod and test Kepler's true volume integral.
LaunchGenerator and Transformer
Spin a hydro generator, step voltage up and down with transformers and deliver power to a village with minimal line losses.
LaunchGeometric Optics
Learn the laws of optics! Move lenses, mirrors, and light sources to understand how rays refract and how real and virtual images are formed.
LaunchGlucose and Mutarotation
Unlock the secrets of sugars! Explore how a linear glucose molecule folds into a cyclic alpha- or beta-form and dynamically transitions from one to the other.
LaunchHalogens, Chlorine and HCl
Compare halogen reactivity, chlorine reactions, and HCl / chloride formation.
LaunchIdeal Heat Engine
Design an ideal heat engine! Change the temperatures of the hot and cold reservoirs to understand what determines efficiency and why the Carnot limit cannot be exceeded.
LaunchHeat Transfer
Compare conduction, convection and radiation: heat rods of different materials, drive convection loops and race black against shiny surfaces.
LaunchHeredity, variability and mutations
Distinguish modificational, combinative and mutational variation; explore mutation levels and genotype-specific reaction norms.
LaunchHooke's Law and Spring Energy
Study elastic deformations. Stretch and compress a spring, change its stiffness, and track how the restoring force is related to potential energy.
LaunchHuman origins and the biological unity of humanity
Explore hominin branching, mosaic traits, and the unity of Homo sapiens.
LaunchBlood: oxygen, ABO and immune memory
Compare O₂ binding, ABO component compatibility and immune memory.
LaunchMuscle forces and body levers
Compare antagonist co-activation, an elbow lever and torques during trunk lean.
LaunchHuman reproduction and development
Connect reproductive organs, fertilization steps, and two prenatal age scales without a fictional health score.
LaunchAlkanes and Homologous Series
Build CnH2n+2 homologs, see the CH₂ difference, and balance alkane combustion.
LaunchHydrogen, Acids–Bases and Water
Generate H₂, mix acids and bases, track pH and the neutralization point, and see why water is a polar solvent.
LaunchHydrogen Bond
Discover the secret of liquid water. Observe how polar molecules attract each other due to weak intermolecular forces — hydrogen bonds.
LaunchHydrostatic Pressure
Measure the pressure at the bottom of a pool. Study how fluid depth, density, and planetary gravity affect the pressure of a liquid column.
LaunchInorganic Classes and Genetic Link
Classify oxides, acids, bases and salts, then follow genetic link equations between classes.
LaunchWave Interference
Observe the magic of wave physics. Create waves from multiple sources and see how they superimpose, constructively amplifying or destructively canceling.
LaunchInverse Proportionality and the Hyperbola
Change k and drag the point along the hyperbola: the rectangle under it always has area k, and the table shows the constant product.
LaunchIon Exchange and Salt Hydrolysis
Predict ion-exchange products and classify salt hydrolysis as acidic, basic, or neutral.
LaunchIron Corrosion and Metal Protection
Find out why iron rusts. Test the effects of water and salts on the corrosion process and discover effective methods to protect metals.
LaunchKepler's Laws
Grasp celestial mechanics. Observe planets moving in ellipses, verify the law of equal areas, and measure how orbital period depends on orbital radius.
LaunchLaw of Universal Gravitation
How are planets kept in orbit? Change the masses of two bodies and the distance between them to explore how the force of gravitational attraction works.
LaunchLever
Study the principles of a lever. Place loads of different masses on a beam, calculate the torque, and find the perfect balance point.
LaunchStoichiometry
Master stoichiometry in practice! Build molecules according to a chemical 'recipe' and determine which substance runs out first, stopping the reaction.
LaunchLinear Functions and Systems: y = mx + b
Change slope (m) and intercept (b), find axis intercepts, and investigate all three cases for two lines: one solution, no solution, and infinitely many solutions.
LaunchSystems of Inequalities and Linear Programming
The feasible region is computed by clipping half-planes, and the fundamental theorem is checked by exhaustion: no interior point beats the best vertex.
LaunchLorentz Force
Launch charged particles into a magnetic field, watch them circle and deflect a current-carrying wire.
LaunchElectromagnetic Induction
Discover Faraday's law. Move a magnet through a wire coil and watch how a changing magnetic field generates an induced current and lights a bulb.
LaunchMars Base Builder
Build an autonomous energy system. Manage solar power during the day, charge batteries, and ensure the base has uninterrupted power throughout the cold Martian night.
LaunchMars Bridge Builder
Design a reliable bridge for the Mars rover. Learn the physics of structures: load distribution, tension, and compression forces to build the strongest truss.
LaunchElectric Circuits on Mars
Help power the Mars base. Build electrical circuits using sources, resistors, and lamps, explore Ohm's law, and study series and parallel connections.
LaunchMartian Rabbits
Explore the impact of environment on survival. Change the Martian climate and observe which advantageous traits help a population of Martian rabbits adapt and survive.
LaunchRobots on Mars
Step into the shoes of a software engineer! Create a proper sequence of commands to navigate the Mars rover around obstacles and reach its target.
LaunchLaunch the Rocket
Tune launch parameters and send a rocket toward Mars.
LaunchEarth-Mars Signal Transmission
Experience communication delay in space! Calculate the radio signal travel time and control the Mars rover from afar, considering the physics of wave propagation.
LaunchMeasurement Lab
Measure length, volume, mass and force with a ruler, measuring cylinder, balance scales and dynamometer. Determine the scale division value and the measurement error.
LaunchMechanical Resonance
Drive a mass on a spring at different frequencies, build the response curve and find the resonance peak.
LaunchMeiosis, fertilization and early development
Trace homolog and chromatid separation, restoration of 2n at fertilization, and overlapping processes of the first eight weeks.
LaunchGenetics
Classical genetics in action! Perform pea crosses, build Punnett squares, and study the patterns of dominant and recessive trait transmission from parents to offspring.
LaunchMetallic Bond
Look inside a metal! Observe how positive ions are held in a crystal lattice by a freely moving 'electron gas', providing malleability and conductivity.
LaunchMetals: Activity Series and Metallurgy
Use the activity series for displacement and follow KR-relevant metallurgy steps (Fe, Al, Cu).
LaunchMitosis
Witness the creation of life! Go through all phases of cell division—from prophase to telophase—and track how chromosomes separate to form two new cells.
LaunchMöbius Strip and Klein Bottle
Dive into crazy topology! Rotate and study paradoxical one-sided surfaces: the Möbius strip and the mysterious Klein bottle with no internal volume.
LaunchMole, Formulas and Avogadro
Convert mass ↔ moles ↔ particles and use molar volume 22.4 L/mol for gases at STP.
LaunchMoon Phases
Understand Moon phases and their link to orbital position.
LaunchNegative Numbers: Thermometer & Elevator
Understand negative numbers with a thermometer, an elevator, and addition and subtraction jumps on a number line.
LaunchNeuron and Nerve Impulse Transmission
How do brain cells communicate? Follow the path of an electrical signal along a neuron's axon, study the synapse mechanism, and the release of neurotransmitters.
LaunchNitrogen, Phosphorus and Fertilizers
Explore NH₃ / HNO₃ / H₃PO₄ and NPK fertilizer ratios for plant nutrition.
LaunchAllotropy of Nonmetals
One element — different properties! Compare the structures of diamond and graphite, oxygen and ozone, phosphorus, and sulfur to understand the nature of allotropy.
LaunchFission and the Nuclear Reactor
Fire a neutron, grow a chain reaction and then tame it with control rods to hold a reactor at steady power.
LaunchInequalities on a Number Line
Visualize inequalities. Plot strict and non-strict intervals on the number line, find intersections of sets, and solve systems of inequalities.
LaunchDC Circuits Lab
Build DC circuits and compare series vs. parallel.
LaunchOrganics
Find out how the same composition yields different properties! Build isomers, modify the carbon skeleton, and identify functional groups.
LaunchOrganic Reactions
Understand the mechanisms of organic chemistry! Recognize reaction types: substitution, addition, elimination, and polymerization.
LaunchOrigin of life and evidence for evolution
Compare origin-of-life models, independent evidence, and lineage branching.
LaunchOxygen, Oxides, Combustion and Hess
Compare O₂ roles, oxide acidity/basicity, combustion heat, and Hess’s law pathway sums.
LaunchAngles at Parallel Lines and a Transversal
Change the transversal angle, work through corresponding, alternate and co-interior angles, and test the converse by tilting a line.
LaunchParasitic Fungi
Track tinder fungus infection in a tree and weakening signs.
LaunchElementary Particles
Discover the building blocks of the universe! Explore the Standard Model, assemble protons and neutrons from quarks, and investigate fundamental interactions.
LaunchMathematical Pendulum
Explore the laws of oscillation. Change the string length, bob mass, and release angle to understand what affects the period and frequency of a pendulum.
LaunchPercentages and Discounts
Become a finance master! Calculate sale discounts, taxes, and markups. Solve direct and inverse percentage problems easily and quickly.
LaunchPeriodic Table and Mendeleev’s Law
Explore periods and groups, predict properties from Z, and see metallic character and radius trends.
LaunchPetroleum, Cracking and Polymers
Fractionate crude oil, crack large alkanes, and build polymer chains from monomers.
LaunchPhase Transitions
Grasp the mystery of states of matter! Heat ice and observe how the temperature graph changes during melting and boiling while latent heat does its work.
LaunchPhotoelectric Effect
Test how light frequency and voltage affect the photoelectric effect.
LaunchPhotosynthesis
Explore how light, CO₂, and water limit photosynthesis.
LaunchSigns of Chemical Reactions
Learn to distinguish physical phenomena from chemical ones! Conduct virtual experiments and observe gas evolution, color changes, or precipitate formation.
LaunchArea and Perimeter of Plane Figures
Change sides and height, compare the area from the formula with the area from coordinates, and verify Pick’s theorem.
LaunchPlant communities, agrocenoses and rangelands
Compare Kyrgyzstan plant communities under drought, test agrocenosis resilience, and restore rangeland cover.
LaunchPlant Organs
Study plant organs: root, stem, leaf, flower, and fruit.
LaunchPlant departments and taxonomy
Compare plant departments from algae to angiosperms and flower families.
LaunchWater Transport in Plants and Transpiration
Trace water's path and effects of humidity, wind, and light.
LaunchPolyhedra: Cross-Sections and Nets
Drive a cutting plane through the body: the section is a real plane/edge intersection, which is why a cube yields a triangle, a pentagon or a regular hexagon.
LaunchPolynomials: Multiplication and Factoring
Collect like terms, multiply binomials with an area rectangle, take out a common factor, and factor by grouping.
LaunchGene pools, Hardy–Weinberg and ecogeographic rules
Explore gene pools, evolutionary factors, and the limits of eco-rules.
LaunchPowers, Roots and Irrational Numbers
Check the power laws on tiles, read numbers in standard form, and trap √2 with nested intervals.
LaunchPrism: Net, Surface Area and Volume
Build prisms on different bases, unroll them into nets, add up the surface, and verify Cavalieri’s principle.
LaunchProbability and Frequency
Grasp the laws of randomness! Run tens and hundreds of trials (coin flips or dice rolls) to see how the frequency of an event approaches its probability.
LaunchProgressions: Ladder vs Grains
See the gap between linear and exponential growth: an arithmetic ladder, grains doubling on a chessboard, and simple vs compound interest in a bank deposit.
LaunchProjectile Motion
Calculate the perfect throw! Change the angle, initial velocity, and height to hit the target. Observe the flight trajectory and velocity vectors in real-time.
LaunchProtein Biosynthesis
Trace the path from gene to trait. First, copy information from DNA to mRNA (transcription), and then assemble the protein on a ribosome (translation).
LaunchVolume of Pyramid and Cone
Uncover the secret of the 1/3 volume formula. Compare a pyramid with a prism and a cone with a cylinder to visually prove why their volumes relate as one to three.
LaunchPythagorean Theorem
Squares on the sides of a right triangle and a rearrangement proof: change the legs and verify that a² + b² = c².
LaunchQuadratic Equations: discriminant, Vieta, completing the square
Link the sign of the discriminant to how many times the parabola meets the x-axis, master Vieta's formulas, and complete the square geometrically.
LaunchParabola: y = ax² + bx + c
Explore the quadratic function. Control the coefficients a, b, and c to observe how the vertex shifts, the shape changes, and the roots of the parabola appear.
LaunchQualitative Reactions
Become an analytical chemist! Perform qualitative reactions with reagents and identify unknown ions by the color of the precipitate or the smell of the gas.
LaunchRadioactive Decay
Watch nuclei decay randomly yet predictably, verify the half-life law and test how far alpha, beta and gamma rays penetrate.
LaunchRandom Variables: Expectation and Variance
The expectation is the balance point of the bars, and n·p and n·p·(1−p) are checked against direct summation; sampling shows the law of large numbers.
LaunchThe Rate Machine
Drive linked quantities and watch the chain rule in Leibniz's and Newton's notation.
LaunchRatios, Proportions & Scale
Mix paint, scale recipes, and read a map scale using ratios and proportions.
LaunchReaction Rate and Catalysts
Control chemical collisions! Change temperature, add catalysts, and overcome activation energy barriers to speed up the chemical reaction.
LaunchRedox Reactions
Track the invisible exchange! Study oxidation and reduction at the atomic level by observing electron transfer between reactants.
LaunchGalvanic Cell
Build your own battery! Connect the electrodes and salt bridge, and watch how chemical energy is converted into electrical current.
LaunchRiemann Sums and Integral
Understand the idea of integration! Divide the area under a curve into rectangles or trapezoids, increase their number, and observe how the sum approaches the exact integral.
LaunchRight-Triangle Trigonometry
Drag the angle and watch how sin, cos and tan link the sides of a right triangle — through a ladder, a shadow and a mountain.
LaunchRutherford Scattering
Look inside the atom! Bombard gold foil with alpha particles and observe their scattering to prove the existence of a dense atomic nucleus.
LaunchSeed, germination, root and soil
Compare seed reserve tissues, germination conditions and soil limits on root growth.
LaunchVision, hearing and conditioned learning
Compare eye accommodation, occupational noise dose and acquisition of a conditioned response.
LaunchSets and Venn Diagrams
Define sets by a rule, take unions, intersections and differences, and verify inclusion–exclusion and the seven Venn regions.
LaunchHuman Skeleton
Explore the regions of the skeleton, bone structure and types of bone joints.
LaunchSky and Ecliptic
Navigate by the stars! Explore the celestial sphere, find planets and zodiac constellations using the horizon, ecliptic, and equatorial coordinates.
LaunchSolutions and Dilution
Learn to prepare solutions of desired concentration! Mix liquids, perform serial dilutions, and verify calculations using a pipette and volumetric flask.
LaunchSolution Mixing and Diffusion
Explore the process of dissolving substances in water. Calculate the final concentration when mixing, observe particle diffusion, and see how using a stirrer accelerates homogeneity.
LaunchSound
See how the world sounds! Change the frequency and amplitude of a sound wave to understand how they determine pitch and loudness.
LaunchLines and Planes in Space
Orbit the scene and move the lines apart: intersecting, parallel and skew are decided by the cross and triple products, not by a caption.
LaunchSpecial Relativity
Ride a light clock near the speed of light: time dilation, length contraction and why nothing outruns light.
LaunchStatistics
Learn the basics of statistics. Add data points, move them around, and observe how the arithmetic mean, median, mode, and outliers react to changes.
LaunchStrong and Weak Acids and Bases
Compare strong and weak electrolytes: watch dissociation at the particle level, test solutions with a light bulb, and see why equal concentrations give different pH.
LaunchSulfur, Oxides and Sulfuric Acid
Follow S → SO₂ → SO₃ → H₂SO₄ (contact process) and sulfate uses / ecology.
LaunchTriangle: angles & congruence
Drag the vertices, tear the angles into a 180° sum, build triangles by the SAS, ASA and SSS criteria, and compare angles at parallel lines and a transversal.
LaunchSimilar Triangles and Thales’ Theorem
Change the similarity ratio, test the AA/SSS/SAS criteria and Thales’ theorem, and measure a tower from its shadow.
LaunchTrigonometric Identities and Equations
Drag the point around the unit circle, add angles and solve sin x = a: every identity is checked by evaluating both sides.
LaunchUniform Motion and Graphs
Control a body moving along a straight track and read live x(t) and v(t) graphs. Compare uniform and uniformly accelerated motion, path and displacement.
LaunchTrigonometry
Unlock the secret of trigonometry using the unit circle. Rotate the radius and visually link the angle with sine, cosine, and tangent.
LaunchVectors on a Plane
Control direction and magnitude! Draw vectors, find their coordinates, projections on axes, and master the rules of vector addition and subtraction.
LaunchVertebrate classes and organ systems
Compare fish to mammals: organ systems and Red Book fauna of Kyrgyzstan.
LaunchViruses: structure, replication and prevention
Compare a T4-like phage, influenza A and HIV-1 through virion structure, host-dependent replication and route-specific prevention.
LaunchVitamins
Discover how vitamins help our body! Learn their roles (vision, bones, immunity), find main food sources, and practice building a balanced and healthy meal plate.
LaunchWater Hardness and Ions
Measure Ca²⁺/Mg²⁺ hardness, distinguish temporary vs permanent hardness, and soften water.
Launch