Simulations for Middle School

Explore an adult male reference body in 3D. Reveal 14 anatomical systems, search thousands of named structures, isolate organs, and pull 2,209 modeled pieces apart to see how the body is organized.

Free interactive photosynthesis simulation. Explore photosynthesis hands-on online — great for whole-class or independent practice.

Free interactive pendulum motion simulation. Explore pendulum motion hands-on online — great for whole-class or independent practice.

Free interactive forces and motion simulation. Explore forces and motion hands-on online — great for whole-class or independent practic

Free interactive food webs simulation. Explore food webs hands-on online — great for whole-class or independent practice.

Free interactive ecosystems simulation. Explore ecosystems hands-on online — great for whole-class or independent practice.

Free interactive the digestive system simulation. Explore the digestive system hands-on online — great for whole-class or independent p

Free interactive electric circuits simulation. Explore electric circuits hands-on online — great for whole-class or independent practic

Free interactive gravity simulation. Explore gravity hands-on online — great for whole-class or independent practice.

Spin a spinner, flip a coin or roll a die and watch two sets of bars: the chances the shapes predict, and the results you actually got. Ten spins prove nothing; a few hundred and the two are hard to tell apart.

Free interactive simple machines simulation. Explore simple machines hands-on online — great for whole-class or independent practice.

Type any function and see its shape straight away. Plot up to three at once in three colours to compare them, drag the trace point to read a value off a curve, and see where each one crosses zero.

Free interactive the solar system simulation. Explore the solar system hands-on online — great for whole-class or independent practice.

Free interactive the rock cycle simulation. Explore the rock cycle hands-on online — great for whole-class or independent practice.

Free interactive human body systems simulation. Explore human body systems hands-on online — great for whole-class or independent pract

Follow oxygen-rich and oxygen-poor blood round the loop from the heart to the lungs and body. Change heart rate and stroke volume and watch cardiac output — the blood moved each minute — respond.

Free interactive heat transfer simulation. Explore heat transfer hands-on online — great for whole-class or independent practice.

Move m and watch the line tilt; move b and watch it slide. Or drag the two points on the line and read the equation it writes back. A rise-over-run staircase climbs the line so slope becomes something you can count.

Push two plates together at the speed your fingernails grow and watch mountains rise, or pull them apart and see new ocean floor form. Set each plate's speed and work out how long a gap takes to close.

Free interactive sound waves simulation. Explore sound waves hands-on online — great for whole-class or independent practice.

Free interactive buoyancy and density simulation. Explore buoyancy and density hands-on online — great for whole-class or independent p

Watch the lungs swell and empty with every breath as air moves in and out of the windpipe. Change breaths per minute and the air in each breath, and see how much air is moved a minute.

Aim a launcher and fire. See the whole parabola before the shot lands, change launch speed, angle and gravity, find the angle that throws furthest, and discover which pairs of angles land in the same place.

Free interactive natural selection simulation. Explore natural selection hands-on online — great for whole-class or independent practi