MATH Area math game: Roll the dice and draw the area array on your own grid - first to fill it wins. Or 2 players choose a different colored pen each, use one grid and the player who cannot complete the last array is the loser.
Place Value Cups. Use the cups to understand place value practice counting forward and backward learn the names of large numbers decompose numbers to expanded form. I would either label the cups 'ones' 'tens' etc. or add a comma cup or decimal point cup
From the Wise & Witty Teacher, My Perfect Pizza fractions lesson. Perfect for third grade math.
Love this, I'll have to recreate it in American English though :)