Thanks for having my back OHG.

Kriston, sheesh! You know I'd never hold out on you! smile

I got the teacher book, but that's just me. I'm not a big science person and wanted as much info as possible to answer DD's questions.
Whether or not you get the teacher's book, I highly recommend the workbooks. They have the experiments that go along with the book and DD has loved writing in them.

Neato