I purchased the "Revised" COOP/HSPT Study Cards on CD-Rom to help my son study for his upcoming HSPT test.There are three portions on the CD. 1) Arithmetic 2) Algebra 3) GeometryWe didn't study the Arithmetic portion and started with Algebra. When I saw that the answer to question #11) 5 x 0 = 5 was "true" I knew there was a problem. The subsequent 15 answers were also incorrect (the answers were for other questions). I emailed the company through their website a week ago but haven't received a response.We decided to switch to the Geometry section, but that portion was completely blank. Nothing there.Needless to say, I cannot let my son work with these study cards because he could be learning wrong information. I am really disappointed because some of the features of the product are pretty cool but those features are pointless if the information is wrong and therefore, unreliable.