How do I add a student to an opportunity?

If you want to sign students up for an event for them, you'd have to login as them.

We do not have a way you can add students to an opportunity from the admin side other than you logging in as them.

Some schools have the feature enabled to login as a student via the Member Lookup page. If you do not have this feature enabled, see this help article on next steps to turn this feature on.