0:00 / 5:58
All About Cells and Cell Structure
A FreeSchool lesson on cells — the 'building blocks of life.' Learn how all living things are made of cells, what the cell membrane does, and why plant cells have an extra cell wall.
How it works
- Press play to start the video.
- Videos 5 minutes or longer pause once or twice for a quick check. Get it right and you're on your way. If not, you'll see a friendly explanation and the video simply keeps going. Short videos skip the checks.
- At the end there's a 3-question test. Score 60% or more to complete the lesson, and 80% or more to master it. You can always watch again and try for a higher score.