Do I need the instructional vid? I would be using this for the Foundations level. It's $30 new, and if I can save that $$, I'd be thrilled! BTW, I have a degree in secondary education, so I know how to teach. I didn't know if the vid was more about "how" to teach, or if it's a prep for doing the specific lessons for Math U See. Thanks!

The video shows you how to do the lesson. I recommend getting the video, but not the teacher's instruction manual. It is an alternative way to teaching math, so by looking at the workbook page, you may not necessarily know how to approach it. The video will show you how to approach the given math problems. Hope that makes sense.