Sessions from TC and SE?

just out of curiosity where does gregmat get the questions that are used in the TC / SE sessions? are they out of the power prep GRE ETS guides? I’m trying to find where to locate these questions instead of writing down the questions each time. its very time consuming. I’m using the 1 month plan. so any guidance is greatly appreciated.

Most are from ETS GRE big book which you can find via a simple google search.
Rest are from ETS ( OG + Verbal reasoning ).