The following are lessons and worksheets that constitute a quick course in trigonometry ideal for students reviewing before taking a calculus course. Read the lesson, try the worksheet, and check your solutions. These files could also be used by a student studying trigonometry for the first time.
The files found by clicking the following link constitute a quick review of major geometry topics taught at the high school level. They are ideal for a student reviewing for a placement exam or a course that uses geometry.
Atomic Chess is a fun chess variant that can be played on the Free Internet Chess Server (FICS) . My handle on that site is Rekursiv. I've collected together here some books, articles, and videos that I've authored about this game.
Visit my chess blog .