Math: Number Sense and Numeration
Grade 2's are learning how to add 2-digit numbers that add up to 100 (e.g. 23+48).
Grade 3's are learning how to add 3-digit numbers that add up to 1000 (e.g. 423+148)
Students learn how to accurately add numbers when they use the resources that make sense to them.
The first manipulative that has been introduced this year is the ten-block.
At home, you could use pennies to represent "ones" and pencils to represent "tens".
Base-ten Addition Activities Online