I am the administrator for the site but my husband is the classmate. We are using the same computer. I log out and when he tries to log in it won't recognize his password. I went in and changed his password and we still can't get it to let him log in.

Is it giving you a "sorry" message when he tries to log in? If so, I guarantee you that you are typing in his email address and/or his password differently from what's in the system. A record that doesn't match is the ONLY way you can get that "sorry" message. Please go back into his account via your Administrator login and scrutinize his email address to ensure it is is corret in your site. And then for good measure go ahead and type in another password for him too. Save the record. Log out. Now try logging in as him again. If you still can't get in let me know.