Creating Numbers Spreadsheet

Hi
Can anyone guide me through the process of creating spreadsheet containing the following fields?
1. Date.
2. Names of attendants that can be checked and unchecked.
3. fields for filling grades for assignments.
4. Fields for the total of absence days and total of grades.
There are already grade and attendance sheets in Numbers but I thought it would be much more convenient for me to have them in one sheet.
Thank you.