PhET Interactive Simulations — Learning & Classroom Tool

PhET is one of the most valuable free STEM resources online, especially when students need concept-level understanding through simulation rather than static explanation.

PhET is a University of Colorado Boulder project that provides free, research-based science and math simulations. Its official positioning emphasizes interactive exploration across physics, chemistry, biology, earth science, and math, with simulations designed and evaluated for educational effectiveness.

You can use PhET for virtual labs, concept introduction, guided inquiry, homework exploration, classroom demonstrations, and safe experimentation with scientific or mathematical systems.

• Free interactive simulations across multiple STEM domains
• Research-informed design focused on educational effectiveness
• Browser-based and downloadable use options
• Large activity ecosystem for teachers across grade levels

• Excellent for visual and inquiry-based learning
• High educational value at no cost
• Useful across many age groups and STEM subjects

• Simulations are not a full curriculum by themselves
• Teachers still need structure, prompts, and discussion for best results
• Some topics require careful scaffolding to avoid superficial play

PhET is best for science and math teachers, STEM students, tutors, and homeschool environments that want interactive concept exploration.

For related STEM-learning workflows, compare PhET with GeoGebra, Desmos, and Formative.

Are the simulations free? Yes. Free access is a core part of PhET’s value.

Can PhET replace real labs? Not entirely. It is best used as a complement, preparation tool, or safe exploration environment.

June 27, 2026.