http://www.didax.com/fraction-pieces/ - “The use of
manipulatives enhances concept formation when both the concrete and
the connecting stages are fully understood before moving to the
abstract. Many concrete and virtual manipulatives are available to
support the teaching of an array of concepts from number sense
through algebra. Here you will find general information about
manipulatives as well as instructions for the use of specific
materials.”
This site offers manipulatives relevant for elementary grades,
algebra, and geometry.

http://www.borenson.com/ - “Hands-On Equations is algebra for
elementary and middle school students. Hands-On Equations gives
students a concrete representation of the symbols and processes
utilized in solving algebra problems. The symbols are represented by
game pieces and a representation of a balance scale. The processes
are represented by physical actions upon these pieces. As the
algebra problems are solved students are actually seeing, touching
and moving the pieces.

http://www.keypress.com/x5789.xml - Website for Geometry Lab
Classroom manipulatives kits
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