I have a copy of the 3rd Edition PHB (take note: that's 3e, not 3.5e,)and decided to make a few characters using the official character sheet from the back of the book.
Based on what I've learned from 4th Ed., I've filled out most of the sheet, but a few things are confusing, though, and reading through the book and looking online hasn't helped.
In the back of the sheet there's an area for Spells. In there, there's 2 columns of check boxes for "Spell Save DC" and "Spells Per Day". Above that, there is a label "Spell save" and a box called "DC MOD". How do I figure out what to put there?