Illustrative Mathematics: Counting Dots in Arrays

Mathematical arrays can represent several different math skills, including counting groups, multiplication, and even area. In this specific task, learners are asked to identify the addition equations that are equal to a 3 x 4 array....

Take stroll around the classroom while teaching young mathematicians to count fluently with this whole-group math activity. The teacher starts things off by walking around the room while counting up from the number one and continues...

It's time to crack open that piggy bank and see what's inside. First, count up the pennies, nickels, dimes, and quarters, identifying what fraction of them are dimes. Then calculate the total value of the coins, writing another fraction...

In this grade 2 lesson, students use base ten blocks to compose and decompose numbers.

On the 124th day of school, young mathematicians are asked to find out how many days are left in the 180-day school year. The teacher version to the task offers several ways the problem can be solved, and can be used to guide...

This activity addresses CCSS 2.OA.C.4 where students count dots in an array using repeated addition. This skill lays the foundation for an understanding of multiplication.

You are on a trip and need to cross a bridge, but you have to pay tolls in coins. Solve this puzzle by making your way to the island only using 100 coins.

Students look for patterns to determine how many valentines will be distributed in a class of 28 students. After trying the problem, they can look at several other methods that could be used and compare the answer they got. There is also...

Students will practice counting to 120 forward and backward with this whole class game. The teacher will give a counting sequence (for example, 20-120) to the students who will be seated in a circle. The teacher will begin walking around...

In this task, students will roll dice and write and solve addition equations.