Math Is Fun
Math Is Fun: Fill in the Missing Numbers
Click the empty spaces to be given four choices for the missing number. Choose the correct one for each of the empty spaces, then play again!
Better Lesson
Better Lesson: Writing Equations for Arrays
Second graders will learn how to make number sentences for an array by walking around the classroom and writing number sentences for the different arrays the teacher hangs around the room. A video is included, along with examples of...
Better Lesson
Better Lesson: What Is an Array?
Teach a instructional activity about repeated addition and arrays by using this very detailed lesson plan. The author walks you through the instructional activity step-by-step and even includes a video of her teaching about arrays for...
Lawrence Hall of Science
The Math Page: Skill in Arithmetic: Elementary Addition
This resource offers six brief arithmetic lessons: sums less than ten, sums of ten, and sums between ten and twenty, doubling, zero, and a set of general practice problems.
Illustrative Mathematics
Illustrative Mathematics: Counting Dots in Arrays
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.
K-5 Math Teaching Resources
K 5 Math Teaching Resources: Equal Sums [Pdf]
Students draw two cards and determine if the number sentences on them have equal sums.
Arcademics
Arcademics: Kitten Match
Choose two numbers that create the sum of the given number to make a match.
Cool Math
Coolmath: Coolmath4kids: Subtracting Numbers Within 100
Short tutorial showing how to subtract using two-digit numbers in tens and ones columns without regrouping.
Cool Math
Coolmath: Coolmath4kids: Subtracting Numbers Within 100 With Regrouping
A step-by-step tutorial showing how to subtract using two-digit numbers in the tens and ones columns with regrouping. Includes sample problems to try. It also provides links to subtraction games and more.
K-5 Math Teaching Resources
K 5 Math Teaching Resources: Number of the Week [Pdf]
Students will be given numbers of the week and each day will have acitivities to complete using those numbers.
K-5 Math Teaching Resources
K 5 Math Teaching Resources: Find Ten [Pdf]
Find two numbers that add together to make ten and record those problems.
Khan Academy
Khan Academy: Repeated Addition
In this exercise, students practice repeated addition. Students receive immediate feedback and have the opportunity to get hints, watch a tutorial video, and try questions repeatedly.
Illustrative Mathematics
Illustrative Mathematics: k.oa Shake and Spill
The purpose of this task is for students to decompose a number as a sum of two other numbers in more than one way. Students will shake and spill 5 two colored counters and determine how many of each color is showing and record the sum...
Illustrative Mathematics
Illustrative Mathematics: Find the Missing Number
Students will solve addition and subtraction equations with different structures so that they are able to see the connections between addition and subtraction more easily.
Illustrative Mathematics
Illustrative Mathematics: Buttons Odd and Even
The purpose of this task is for young scholars to determine whether a set of objects (up to 20) has an odd or even number of elements. Students will also write an equation to express an even number as a sum of two equal addends and an...
K-5 Math Teaching Resources
K 5 Math Teaching Resources: Find the Missing Number [Pdf]
Students complete an activity to explore adding and subtracting by finding the missing number.
CK-12 Foundation
Ck 12: Elem Math: Overview of Addition Sums to 100 Word Problems
[Free Registration/Login may be required to access all resource tools.] The video explains two addition problems one with regrouping and the other without regrouping.
Starfall
Starfall: Addition and Subtraction Strategies
This learning games focuses on addition and subtraction by filling in the missing number. At the end children can use the arrows on the computer to work a boy through a maze.
Better Lesson
Better Lesson: Filling in the Middle
Students use both area and perimeter to work with geometric shapes.
Khan Academy
Khan Academy: Add 2 Digit Numbers by Making Tens
Practice adding 2-digit numbers like 43+27 that have sums that are multiples of 10.
Better Lesson
Better Lesson: Missing Number Equations
Second graders will become more comfortable making sense of equations presented in missing answer (traditional) and missing number ( nontraditional) formats.
Better Lesson
Better Lesson: Doubles and Halves Are Patterns Too
Can you double an odd number? Can you cut it in half? Patterns in doubles and halves help to answer these questions.
Louisiana Department of Education
Louisiana Doe: Louisiana Believes: Eureka Math Parent Guide: Foundations of Multiplication and Division
A guide to support parents as they work with their students in the foundations of multiplication and division.
K-5 Math Teaching Resources
K 5 Math Teaching Resources: Adding and Subtracting 100 [Pdf]
Students can practice addition and subtraction of 100 on a number line with this activity.