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Built by a teacher to help students visualize science.

Simulations and digital labs, free and with no ads — and a way for students who missed a lab to make it up.

What’s here

  • Simulations

    15 simulations

    Change one variable and watch what happens, from cells to stars.

  • Practice

    47 practice activities

    Quick, visual practice in 10-question runs. A perfect run earns Streak Master.

  • Digital labs

    48 labs

    Full labs with data collection, checkpoints and a write-up students turn in.

  • Review games

    13 games

    Quiz shows, arcade games and class games built on question banks for every course.

For teachers

  1. Sign in with Google

    Use your school Google account. No new password to remember.

  2. Share your class code

    Students join your class with a six-letter code.

  3. Work turns in to your gradebook

    Every lab and test lands in your gradebook, ready to export as a Schoology CSV.

Set up a free class

Who made this

I’m a full-time teacher and a part-time web designer, and I built this site to support my own students. I believe hands-on, interactive simulations make science concepts stick, so every activity here — from genetics to electron configuration — is designed to replace passive memorization with active exploration and problem-solving.

I hope it helps other teachers and students, too, in their pursuit of understanding science. Every simulation is free to use, in your classroom or at home.

Teacher suggestion box

A sim you wish existed, a bug, a change that would help your class — I read every one.

Sign in as a teacher to send a suggestion.

Questions or ideas? Visit the Support page →