Akron Central Schools

Users submit queries and computation requests via a text field. Wolfram Alpha then computes answers and relevant visualizations from a knowledge base of curated, structured data that comes from other sites. The curated data makes Alpha different from semantic search engines, which index a large number of answers and then try to match the question to one.

Educational resources for teachers and students from the Federal Reserve.

The Utah State University has created a website of interactive/virtual math manipulatives.  They broke the manipulatives down by grade level groupings as well as topic area.  There are 20 different areas to choose from and many different tools for each area.

Tutorials on identifying, renaming, comparing, and manipulating fractions.  There are also some games that all relate to fractions.

Interactive Mathematics offers teachers and students resources in Algebra, Trigonometry, Graphs, Complex Numbers, Statistics, Differentiation, Integration and Higher Calculus.  There is also a blog section on the site.  The fonts are set large to be projected in the classroom.