My 4th grader has been preparing for the Science Olympiad Simple Machines event, and we wanted a fun way to review levers, pulleys, inclined planes, mechanical advantage, and Newton’s laws together. So I put together a small study guide as a single-page HTML app:

Simple Machines Study Guide

It’s one self-contained file with the notes, diagrams, and a few practice questions, organized into sections you can click through. No build step, no server, no dependencies. Just open it in a browser.

If your kid is also doing the Simple Machines event, feel free to use it.