Most of the time, every chapter studied in each subject was divided in several sections. Each section consists of five different activities that have the same set of definitions and educational concepts. The activities are: standard crosswords, crosswords with word banks, interactive crosswords in html format, matching activities, and word search worksheets. These five activities can be used wisely by teachers in different ways to reinforce the set of concepts being learned. Activities #52 to #59 are physics videos in AVI format to download. They contain from 5 to 20 problems and will give you a good idea about the structure of the dozens of physics videos we have created. Finally, activities #71 to #80 are 10 BASIC Language programs in high resolution graphics that are found in the BASIC Language book in pdf format we are promoting. If you want to learn good old BASIC language and create powerful programs that work in Windows and Mac computers, now you can. You just need the workbook, the QB64 application released last year, and a desire to learn. The link to download QB64 free from the Internet is found in the Physics Videos web page.