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Learning on your phone

STEMpump.org works on any phone browser, and lessons are laid out for small screens.

  • At the bottom of every lesson, a toolbar has previous and next buttons. They move across chapters too, and next marks the lesson complete.
  • The middle of the toolbar shows where you are, like "Chapter 2 · 3 of 6". Tap it to open the whole course outline and jump anywhere.
  • Tap the magnifying glass at the top of the page to search.

Your progress on your phone's browser is separate from your computer's. See Where is my progress saved?

On an iPhone or iPad, the STEMpump App adds downloads, widgets and more.


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Dark mode and accessibility

STEMpump.org follows your device's appearance setting. Switch your device (or browser) to dark mode and the site switches with it. Printed pages and PDFs always use light colors…

Getting started on STEMpump.org

STEMpump is a free library of courses and camps across science, technology, engineering, art and math, written by students. There's nothing to sign up for: open any course and…

Lesson of the Day and daily picks

Not sure what to learn today? The Library's Discover page picks three things for you every day: The Lesson of the Day: a lesson, quiz or project from any course A featured course…

STEMpump Support

Still need help?

STEMpump is run by a small team of volunteers. We read every message and usually reply within a few days.


  • Email us

    Questions, feedback, or a problem to report: a typo, a wrong answer or something broken. Send us the link and what you saw.

    support@stempump.com
  • Contribute

    Write a course, improve a lesson or share an idea.

    How to contribute