Puzzle sunday (3)

Discovery (from discovery Channel) offers knowledge based puzzles and homework help online. Part of the site is commercial. The homework help is. The CD-ROM to make your own crossword puzzles (for learning words) is too. Some reasoning puzzles are listed in categories under reasoning. There are other categories: lateral thinking, spatial awareness, number and math play. I'm going to give some of the puzzles to my children, I'm sure, if not to adults.
The site is an example for education. Schools need maps of activities at different levels to make it easier for teachers to choose the right exercises for a particular child, taking in account deficits, strengths and special interests.