How to add values from userform to a table in excel worksheet

[hawaii]

Hello, I appreciate any help that I receive from you guys in advance!

My problem is this:
I am creating a grade book in excel, and have created a user form with list boxes that are populate based on assignments and student's ID #'s.

I input a number into the textbox, and I want the command button I have to enter the score into the cell of the student under the correct assignment. I am not sure what avenue to take, and any help would be appreciated. I already have the value's into variables, I just can't figure out the line of code that actually searches through the quizes for the right one, than the student id numbers.

Example

gradebook.jpg