Children Discover Arithmetic: An Introduction to Structural Arithmetic

10-compartment 2-place numbers 4-block actually addends adding addition and subtraction addition facts answer block pairs carry cents common multiple concepts concrete Counting Board decimal denominate numbers dimes discover divide division Dual Board equal errors example experiments figures filled Fretsaw given number goes grasp groove improper fraction inserts large number least common multiple long division look Matching Game materials Max Wertheimer means metic nickels number facts number names number song number stories number symbols number system Number Track number words Pattern Boards pints places the Jumper plates positional notation procedure pupil quarts ratio records remainder result says sequence shows single cubes small number solve spinner game stair step Structural Arithmetic subtraction facts task teacher places teaching ten-blocks tens and units third-plates understand unit blocks Unit Box unit compartment unit's place whole number Windward School write yards