Curated OER
Introduction to Estimation and Making Arrays
Students explore the concept of estimating and organizing a group of objects into an array to count the exact number of items. They create their own arrays and practice elements of estimation.
Curated OER
Skip it to multiply it
First graders make sensible estimates and check the reasonableness of answers.
They make up, tell and record number stories up to 9 about given objects. They skip count in twos, threes and fives.
Curated OER
Make a 100
Second graders develop an understanding of 100 and the quantity for which it stands and examine the relationship between 100 and 10 by estimating the number of jelly beans in a jar.