FigJam is a visual collaborative whiteboard where individual students or teams can diagram, brainstorm, and organize ideas. Watch the video below for more information.
Figma offers its "professional" plan to educators and students for free. Watch the video below to learn how to create your Figma account and verify your school email: Apply for Edu Account
This video offers suggestions for getting students started with FigJam for classroom activities.
Use the official Figma FigJam Help Center for additional support.
The Figma Learn Center also offers this Guide to FigJam resource.