brenda, I have an online grade book. There are three accounts assigned to every student -- a student account and two parent accounts. Students can access their records separately from a parent accessing the grades. I can see when a parent has accessed the account. If they accessed it last semester but not this and if they have reset the password (which is in the case of this family), then I can see that info also. The parent account info was reset in August and never checked (which usually indicates that a student reset the password and not the parent).
If a parent tries to say that he or she wasn't aware of the kid's grade until now then that's usually the piece of info I want to discuss. Why haven't you checked the grade on line (when your son has 22 logins for this semester alone)?