Home page : nrich.maths.org, The nrich maths project cambridge,england. mathematics resources for children,parents and teachers to enrich learning. problems,children's solutions,interactivities. Nlvm number & operations manipulatives, Number & operations (all grade bands) virtual manipulatives for number & operations. number & operations (grades pre-k - 2). Untitled document [marcymathworks.], Listed below is an outline of the topics included in each book. for a complete table of contents as well as sample puzzles for each book, please click on the links above..
Illuminations: interactives, Mobile interactives. school 1:1? integrate technology classroom tablet-optimized interactives today!. http://illuminations.nctm.org/Games-Puzzles.aspx Thinking blocks ratio proportion | mathplayground., Play thinking blocks ratios math playground - model solve word problems ratio proportion.. http://www.mathplayground.com/tb_ratios/thinking_blocks_ratios.html Combination puzzle - wikipedia, A combination puzzle, sequential move puzzle, puzzle consists set pieces manipulated combinations . https://en.wikipedia.org/wiki/Combination_puzzles