Posts: 8,663
Name: Steven Bradley
Location: Boulder, Colorado
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Charles I agree that what you're seeking is best down by a database driven content management system (CMS). I'm pretty sure there are existing systems for what you want to do. I've seen others ask enough similar questions.
I did a quick search and found this site. The page I linked to is an administration system specifically for K-12. It's probably more than you need or want to spend, but it might give you some ideas on what to search for.
One CMS you should definitely look at is Moodle. It's free, open source, and runs on PHP/MySQL. It was created specifically to manage online courses. I don't know for certain, but I would think it could do what you want with the grades.
Here's a case study of Moodle from the K-12 Open Technologies site. I'm posting the link in part so you'll check out the K-12 Open Technologies site. I just found it while searching, but it looks like it could be useful for someone in your position.
In addition to the above I'd think there would be some small ready made free scripts to do roughly what you want, though they'll probably need to be customized. Here's the page from HotScripts with educational scripts. Some will be free, others pay. The free ones generally need a little work to get them to do exactly what you want, but they usually provide a really good start.
Hope some of the above helps.
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