This resource accompanies our Rethink 1st Grade Math Operations and Algebraic Thinking unit. It includes ideas for use, ways to support exceptional children, ways to extend learning, digital resources and tools, tips for supporting English Language Learners and students with visual and hearing impairments. There are also ideas for offline learning.

For this interactive, students place numbers on the scale to make the number sentences true.

Students practice adding objects up to 20 by using pictures to solve number sentences in this interactive resource.

With this interactive, students are given a word problem to solve by adding three numbers. They type in their answer and click Check to see if their answer is correct.

Students solve the addition or subtraction equation represented in the word problem in this interactive resource.

Our preschool animals have fun learning activities for toddlers, preschool and kindergarten. With bright colors, fun animations, animal sounds and narration, they help young kids learn about animals in different environments.

This activity encourages finding/seeking, learning animal sounds, counting and fun!

It has audio instructions and fun animations and sound to keep learning fun. Learn about animals on a farm, animal sounds and build vocabulary and have fun at the same time!

This video resource will reinforce students' understanding of rows and columns in arrays. Towards the end of the video, factors of 24 are discussed. You may opt not to show this portion of the video as it is not a part of the second grade standard.

Students identify subtraction sentences with objects up to 10 by selecting the picture that represents the equation shown in this interactive resource.

For this assessment, students help Mike determine which cards to pick to get close to 20, then explain their reasoning.

Students complete the addition sentence by filling in the missing number with sums up to 20 in this interactive resource.

Students complete the subtraction sentence by filling in the missing number with operands up to 18 in this interactive resource.

For this interactive, students' knowledge and understanding of division are reinforced as they work to demolish tanks with division problems in order to defend their base.

In this interactive, students practice fluently dividing within 100 as they race against students from around the world.

In this assessment, students think about bugs in a jar and decide how many have escaped by drawing a picture to show addition or subtraction.

For this activity, students work with a partner to toss two-colored counters and find two numbers on a grid that equal 10. Students write the addition fact and continue taking turns until all pairs of numbers that equal 10 have been found. Students count to see who recorded the most facts of 10.

For this assessment, students use number cards to determine the missing number for the equations.

This lesson uses the children's rhyme "Five Little Speckled Frogs" to demonstrate subtraction through acting out and with the use of manipulatives.

For this assessment, students decide which groups of fruits should be picked to make a fruit salad consisting of 15 fruits.