A teacher and a plan book go together like peanut butter and jelly. The problem with a traditional plan book is that it is one more thing to carry around or lose. I’ve been searching for a digital plan book for years, and I think I finally found the right one. Planbook by Hellmansoft is a plan book for your Mac (it works on Windows, too) that is easy to use and affordable. The developer, Jeff Hellman, has done a great job in making this a fully useable digital plan book. I guess being a teacher himself had a lot to with that.