Plant Science at Khan Academy

Khan Academy offers self-paced lessons in plant biology for middle and high school students.

The Biology Library Unit on Plant Biology discusses phototropism and photoperiodism.

In the Middle School Biology Course, the Unit on Matter and Energy in Organisms provides lessons in photosynthesis.

In the Biology Unit on Photosynthesis, for grades 9-12, students learn about light dependent reactions, the Calvin cycle, and photorespiration.