This is a task from the Illustrative Mathematics website that is one part of a complete illustration of the standard to which it is aligned. Each task has at least one solution and some commentary that addresses important asects of the task and its potential use. Here are the first few lines of the commentary for this task: Louis wants to give \$15 to help kids who need school supplies. He also wants to buy a pair of shoes for \$39. How much money will he have to save for ...

This short video and interactive assessment activity is designed to teach second graders an overview of addition (sums to 100).

This short video and interactive assessment activity is designed to teach second graders an overview of mixed operations (numbers to 1,000).

This short video and interactive assessment activity is designed to teach third graders an overview of mixed operations.

In this assessment task, students compute problems that add and subtract 10s and 100s and explain their thinking.

This short video and interactive assessment activity is designed to teach second graders about adding and subtracting (numbers up to 20) - word problems.

This short video and interactive assessment activity is designed to teach fourth graders about adding and subtracting fractions - word problems.

This short video and interactive assessment activity is designed to teach fourth graders about adding 3 numbers - word problems.

VIDEO 3 OF 3 - This video addresses NC standard 5.NF.1. It explains how to connect the use of models for addition/subtraction of fractions to the standard algorithm for adding/subtracting fractions.

VIDEO 2 OF 3 - This video addresses NC standard 5.NF.1. It explains strategies for making estimates when adding and subtracting fractions with unlike denominators. Strategies for making estimates before and after problems solving are provided.

VIDEO 1 OF 3 - This video addresses NC standard 5.NF.1. It explains WHY we create equivalent fractions when adding unlike denominators, and HOW to create equivalent fractions when adding unlike denominators.

This brief video shows students how to enter a fraction into the TI-15 calculator and to add fractions. Students should access to a TI-15 calculator while viewing, This video may be embedded within Google Classroom.

This is an interactive assessment and video designed to teach Adding and Subtracting (Numbers up to 20) - Word Problems to first graders.

This short video and interactive assessment activity is designed to teach fourth graders about adding and subtracting terms (numbers to 100).

Students decompose numbers less than or equal to 10 into pairs in more than one way by using objects or drawings, and they will record each decomposition by a drawing or equation (e.g. 5= 2 + 3 and 5 = 4+1).

This short video and interactive assessment activity is designed to teach fourth graders about addition: completing the addition sentence.

The purpose of this task is to study some patterns in a small addition table. Each pattern identified persists for a larger table and if more time is available for this activity students should be encouraged to explore these patterns in larger tables.

This unit is to be used with second grade students to teach addition and subtraction strategies, or remediate with students needing extra practice.

This course features a video review of addition up to the sum of ten for first graders.

This short video and interactive assessment activity is designed to teach second graders an overview of addition (sums to 10).