high school

From the Metropolitan Museum onf Art, here are eighteen interactive web games that teach about art, art theory and artists.  Many cultures and time periods are represented.  There are games for all ages, but if a game doesn't seem geared toward younger children, I'd recommend screening it first (for example, the one on Van Gogh's life includes mention of his mental trouble and suicide).

Part of the Metropolitan Museum of Art's website.  Browse art by culture, region, thematic category and era.  Includes background information and key events for each timeline.  There are also thematic essays on a broad number of topics.  The information here is written for adults, or perhaps high school students, but could be used a resource for gathering information for younger kids.  A rich and extensive resource-- to give a better idea of the extent of the site, there are 92 links within the site related to Ancient Greece and 123 related to European Art in Renais

This free site features 23 different interactive tutorials on a range of math concepts.  The focus is on understanding concepts, not drill.  The tutorials are "taught" by friendly animated characters-- it's not as fun as Cyberchase, but it's not too dry either.

The topics covered are: decimals, fractions, basic geometry, plotting points on an XY coordinate system, and probability.  If there's a topic that your child isn't getting or is resistant to being taught, this could be a helpful site.

Illuminations is a website maintianed by the National Council of Teachers of Mathematics.  The website has interactive math games that allow kids to explore math concepts or review math facts, without being tedious drills.  A few favorites in our house: