Dynamic Tools helps users explore fractions of shapes and grids. Shape fractions Dynamic fractions
Fraction Fiddle helps users explore problems involving fractions. Fraction fiddle: comparing unit fractions
Number Line helps users to record how they solve addition and subtraction problems using a number line. Number Line
Scale Matters helps users explore numberlines with a variety of scales. Scale matters: tens Scale matters: hundreds Scale matters: simple units
The Array introduces users to the array model of multiplication. The array
The Difference Bar helps users solve subraction problems by partitioning and comparing. The difference bar: make your own easy subtractions The difference bar: generate easy subtractions Difference bars
The Part Adder helps users add numbers by partitioning and combining. The part-adder: make your own easy sums The part-adder: generate easy sums The part-adder
The Take-Away Bar helps users solve subraction problems by partitioning. The take-away bar: make your own easy subtractions The take-away bar: generate easy subtractions Take-away bars
Wishball is a game involving addition and subtraction with place value. Wishball: tens Wishball: hundreds Wishball challenge: tens Wishball challenge: hundreds
NLVM: Fraction manipulatives Fraction pieces Fractions: visualising Fractions: parts of a whole
NLVM: Number manipulatives Numberline arithmetic Numberline bars Diffy
Modeling Numbers helps users to explore numbers using a variety of representations. Modeling Numbers: 3-digit numbers
Place Value Blocks allows users to build numbers with 1s, 10s, 100s and 1000s blocks. Place Value Blocks
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