What we do

At STEM OnLine, we offer hundreds of free online educational resources for STEM education (Science, Technology, Engineering, and Mathematics). All of our resources can be used directly in your browser, without the need to install additional software, making it easy for students, teachers, and enthusiasts to access interactive learning right away.

Mathematics

More than 40 online simulations and interactive activities to learn and teach Mathematics in a practical and visual way

Physics

Over 140 online simulations and virtual experiments to explore the principles of Physics visually and enjoyably

Chemistry

More than 70 interactive simulations and virtual labs to understand reactions, bonds, and properties of matter step by step

Earth Science

Over 65 online simulations and other educational resources to discover astronomy, geology, and much more

Circuits

A collection of interactive online simulations to build, measure, and understand electric circuits in a visual and hands-on way

STEM OnLine 2026 Recognition and Award

We are proud to announce that STEM OnLine has been recognized by Acquisition International as the “Best Online STEM Education Platform 2026”. This recognition reflects our commitment to educational quality, innovation in interactive resources, and excellence in online learning.

This award confirms that STEM OnLine offers high-quality online educational resources, carefully selected to facilitate learning in science, technology, engineering, and mathematics. It motivates us to continue improving every day, and we want to thank our visitors, collaborators, and the entire STEM community for their effort and dedication, which have made this recognition possible.

How Our Resources Are Organized

Our resources are organized by subject area to make it quick and easy to find what you need.

Within each subject area, resources are divided into thematic units, and some may appear in more than one unit if they are relevant to multiple topics. This structure allows users to easily select materials that match their interests and educational level, making online learning more accessible and organized.

How Our Resources Are Organized

Our resources are organized by subject area to make it quick and easy to find what you need.

Types of resources available

Most of our resources are interactive simulations, but we also include other formats that enhance learning, such as educational videos, animations, mathematical graphs, 3D molecules, and interactive images. Each resource has an identifying icon, allowing you to quickly recognize its type and intuitively select the most appropriate material.

Videos

Animations

Simulations

Graphics

3D molecules

3D images

Thanks to this diversity, users can combine different formats to suit their needs, making STEM learning dynamic, visual, and tailored to different learning styles.

Diversity and consistency

Our resources come from a wide variety of sources and formats, including well-known platforms such as PhET, JavaLab, and other reliable sources. We have taken great care to present them in a consistent and clear manner, ensuring that the learning experience is coherent and effective.

In addition, each thematic unit is linked to one or more scientific giants, connecting the content to the historical discoveries and advancements that inspired it, to offer a more comprehensive and contextualized learning experience. Thanks to this organization, users can access a wide variety of interactive materials without sacrificing clarity or ease of use, making online STEM learning accessible, comprehensive, and high-quality.

A complement to traditional learning

At STEM OnLine, we believe that online resources should complement—and never replace—traditional learning: in-person classes, textbooks, and other educational materials. That’s why, in each thematic unit, we present a selection of featured online courses and educational materials, carefully chosen for their quality and usefulness.

These resources are designed to support students, teachers, and enthusiasts by offering interactive tools that reinforce concepts learned in the classroom and encourage independent and active learning.