Solar System Explorer
An interactive lesson that teaches the structure of the solar system through concept cards, an orbit simulator, and a scored quiz.
Browse the complete catalog of hands-on labs and visual explainers. One featured lesson is open to everyone each week; free accounts can open three lessons each month, and Plus unlocks them all.
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An interactive lesson that teaches the structure of the solar system through concept cards, an orbit simulator, and a scored quiz.
A polished interactive lesson on photosynthesis with progressive concept cards, a discovery-based limiting-factor playground, and a scored quiz.
An interactive lesson on Moon phases that helps learners understand the changing appearance of the Moon through Sun-Earth-Moon geometry, hands-on exploration, and a scored quiz.
Explore all 118 elements through a luminous clickable table, original illustrated real-world uses, guided group and electron-block trails, narration, and a comprehensive mastery challenge.
Interactive Earth-Sun lesson on axial tilt, hemispheres, latitude, day length, and why seasons happen.
Interactive science lesson for building atoms, testing molecule recipes, and connecting bonding to formulas and properties.
Move particles across a selective membrane and compare diffusion, osmosis, and active transport.
Tune collisions, activation energy, and temperature inside a particle chamber to explain reaction rates and energy changes.
Connect producers, consumers, and decomposers to keep a living ecosystem in balance.
Place charges and reveal field vectors, equipotential contours, force, energy, and test-charge motion.
Follow energy as it changes form and moves through a lively chain-reaction machine.
Launch carts, read force arrows, and predict how mass and speed shape collision outcomes.
Change an environment and watch inherited traits become more or less common across generations.
An interactive lesson exploring Newton’s three laws of motion with simulations, guided discovery, and voice narration.
Move Earth’s plates and watch ridges, trenches, mountains, earthquakes, and volcanoes emerge.
Interactive science lesson for tracing how magma rises, how eruption style changes, and why volcanoes can be both dangerous and useful.
Combine two living waves and see amplitude, frequency, phase, superposition, beats, and standing patterns emerge.