In this lesson, students make number bonds through ten with a subtraction focus and apply to one-step word problems.

In this lesson, students make a ten to add and subtract within 20.

In this lesson, students decompose to subtract from a ten when subtracting within 20 and apply to one-step word problems.

In this assessment task, students collect data on how other students get to school then represent the data on charts and graphs.

This short video and interactive assessment activity is designed to teach second graders about selecting the incorrect subtraction sentence (numbers up to 20).

This short video and interactive assessment activity is designed to teach second graders about selecting the correct addition sentence.

Jet Ski Addition is an educational multi-player racing game for kids to practice addition. How quickly the student correctly answers the addition problems determines how quickly the jet ski will go. The student with the fastest rate of correct answers will win the race. Hits and misses are recorded and displayed at the end of the game, along with the student's rate. 1-4 players can play at once.

This video has been created by NCDPI. Watch this video to learn about the intended purpose of NCDPI's K-2 mid-year and summative math assessments. This video describes suggestions for administration, scoring, and next steps.

Marble Drop Addition is an arcade-style educational game for kids to practice addition. To play the game kids must collect numbered marbles that add up to the target number shown at the top of the screen. Players will learn that there are often many different combinations of numbers that add up to the target number. Make as many target numbers as possible before the time runs out!

In this game, students pick from four operations: Addition, Subtraction, Multiplication or Division and difficulty level. Get 5 math problems correct in a row to take foul shots with the basketball.

Math Quiz is a quick online quiz to check your math skills! You pick from four quizzes: Addition, Subtraction, Multiplication or Division and difficulty level. Score reports are displayed after a quiz is completed.

This document is the About the Cluster document created by the authors of the NC2ML Instructional Frameworks. Read this document prior to teaching the cluster in order to get insight into the clustering of the standards, mathematics to be taught, and important considerations.This document is not remixable since the document has been written by creators of the NC2ML Instructional Frameworks.

This 2 unit of number and operations lessons explores addition and subtraction on a number line through 4 hands-on activities.

This 2 unit of number and operations lessons explores addition and subtraction strategies and solving equations through 2 hands-on activities and 2 worksheets.

For this interactive, students select from one of five levels to practice addition facts to 9 by selecting the penguin with the correct answer to the equation.

This is a blended unit based on Unit 3 of the second grade Everyday Math series.

This unit will focus on strategies for solving subtraction problems within 20.  Students will learn strategies including: counting up and back on a open number line, using their knowledge of addition/subtraction facts within 10 to solve larger problems, and using doubles facts to solve subtraction problems.  This unit builds on the last unit as students lean on their addition knowledge to help with subtraction. The big goal is for students to develop fluency with subtraction facts within 20.

This resource is part of Tools4NCTeachers.

In this lesson, students will be figuring out the addends that add up to the correct sums. They will also be creating and solving equations with more than two addends.