Welcome! I am so excited you have discovered Professor B Mathematics! I am Mollie Shaw and I purchased this wonderful and transformative curriculum in October 2018. After using it for the last 20 years with struggling learners as well as gifted students, I can guarantee you that this program works!
There are two versions of the Professor B Levels One, Two and Three. One is in book version and one is a CD. Click on the Help Me Decide button to understand the differences.