The best thing about HPI books is that they are so easy to learn and understand. My General Knowledge was always poor, so I started studying the Just Awareness 8. The practice is great for my GK.
My child is above average when it comes to academics but her English Subject needed improvement and then someone referred the HPI AP Workbook. It was the best move we made for our daughter. We are impressed with her academic growth in English, especially English literature.
There are so many great things about the HPI Books. They are really easy to understand, they build on success, and my child has really progressed through his educational tenure with lifelong knowledge and great marks.