@levelj
https://community.canvaslms.com/docs/DOC-10612-4212710340 is the guide that should help your students.
Some schools may have a separate authentications though, so the student may need go through a student portal to update their password, or contact the local Canvas Admin.
This discussion post is outdated and has been archived. Please use the Community question forums and official documentation for the most current and accurate information.