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.
LaunchAlgebraic Identities by Area
Build squares and rectangles to see why (a+b)², (a-b)², and a²-b² work.
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.
LaunchAmmonia (NH₃)
Explore the ammonia molecule. Learn how the lone electron pair of nitrogen turns the molecule into a trigonal pyramid and creates a dipole moment.
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 Breeding and Selection
Become an animal breeder! Select rabbits for fur density and stamina, breed them over several generations, and create a new unique breed.
LaunchAnimal Classification
Explore the animal kingdom. Compare vertebrates and invertebrates, identify classes by key traits (structure, habitat), and test your knowledge in mini-missions.
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.
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.
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.
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.
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.
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.
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 molecules from atoms! Draw Lewis structures, account for lone electron pairs, and learn how they shape the 3D geometry of molecules via VSEPR theory.
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.
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.
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.
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.
LaunchElectrolysis
Pass current through salt and acid solutions. Discover why copper deposits or hydrogen evolves at the cathode, and test Faraday's law in action.
LaunchElectromagnetic Spectrum
Match EM bands and link wavelength with frequency and energy.
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.
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.
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.
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.
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.
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.
LaunchWave Interference
Observe the magic of wave physics. Create waves from multiple sources and see how they superimpose, constructively amplifying or destructively canceling.
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: y = mx + b
Understand the essence of a straight line. Change the slope (m) and intercept (b), find intersection points with axes, and solve systems of linear equations graphically.
LaunchSystems of Linear Equations
Find the intersections of lines! Solve systems of equations graphically and explore three possible cases: one solution, no solutions (parallel), or infinitely many.
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.
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.
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.
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.
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.
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.
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.
LaunchpH & Neutralization
Mix reagents like a true chemist! Add acid or base, monitor the pH of the solution, and learn how to achieve complete neutralization.
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.
LaunchPlant Breeding and Selection
Create the perfect tomato variety! Improve fruit size, yield, and drought resistance from generation to generation, finding the right balance between useful qualities.
LaunchPlant Organs
Study plant organs: root, stem, leaf, flower, and fruit.
LaunchWater Transport in Plants and Transpiration
Trace water's path and effects of humidity, wind, and light.
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.
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.
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.
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.
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.
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.
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.
Launch