The suite uses animated tens and units “blocks” to give learners experiences from place value to the full notation of addition and subtraction bridging ten. Explore: See the effect of adding units or tens and taking then away. Make the Number: An activity with a learning mode and an assessment mode. What’s the number? Identify the number made by the blocks. Sums with blocks Addition and Subtraction including the bridging of ten. Written Sums: Notation of sums, including carrying and decomposition.