Changes

I keep a spiral notebook of all of my precalc notes. I started it in 2004 when we got our new books and have edited through the years by stapling on the new versions.  Some pages have 3 - 4 edits and some I totally skip altogether.

It hit me today how different my notes (and my class overall) are then they used to be.

Then:

Now:

Same section, same material.

Amazing.