You may not realise, but you have asked for a lot here.
For a start your design is not good and will lead to difficulties.
Here is a better design showing 3 tables and linking.
http://docs.google.com/Doc?id=dfzbst2k_10xf588 kfk
Please enforce referential integrity when linking the tables.
Input data into student table first, then into grades table and at the same time link to the student by clicking on the little plus sign on the left of each record.
This will automatically put data into the other table.
Have a go at this and then I will put some queries up in another document.
I am going abroad on holiday for a week this Saturday, so I will not be able to help you much more till I come back.
I may be able to put a few example queries for you to look at before I go.
If you are wanting to make this into a fancy system with input forms and proper Access reports there is quite a lot of work involved.
If you just want rough and ready on-screen stuff then it's quite a lot less work.