I know this product is sold through a MLM. Not sure how it got on Amazon but I gave it a whirl. Ridiculous claims. Don't waste your time or money.

I have used the MS Office 2007 version of Professor Teaches for about two years now and love it. The way they have structured the lessons makes it easy to find what you want to learn without a lot of looking. The lessons are complete and take you smoothly from one concept to the next with clear summaries, and a test at the end of each lesson to see if you have learned anything. They even track your results.

I don't know if it works or not but I have had septic tanks for years and I have been using Rid-x for years. The theory is sound and I have almost never had to have a system pumped out.

It is a very nice product. It was as described and very well packaged. Great price. Would recommend to others.