These equations have lost their signs! Only one sign — plus or minus — can make each equation true.

Two-digit addition troubling your second grader? The only way to get the concept down is practice, practice ... and more practice!

There are plenty of fish in the sea! But only a few add together to make 12! This fun worksheet will help your child practice his simple addition.

Not only can your child practice her math facts with numbers between 1 and 20, she'll also practice writing addition problems with the correct symbols.

Groups of ten make addition a breeze! Use this nifty worksheet to learn about the "circle ten" shortcut.

Use this glossary with the EL Support Lesson: Nature Counting.

Use this glossary with the EL Support Lesson: Cube Trains.

Use this glossary with the EL Support Lesson: Let's Add!

Use these vocabulary cards with the EL Support Lesson: Cube Trains.

Use this glossary with the EL Support Lesson: Add Them Up!

Use these vocabulary cards with the EL Support Lesson: Lets Add!

Use these vocabulary cards with the EL Support Lesson: Nature Counting.

Use this glossary with the EL Support Lesson: Addition Problem Solving.

Use this glossary with the EL Support Lesson Plan: Adding Within 20.

Use these vocabulary cards with the EL Support Lesson: Fact Family Houses.

Use these vocabulary cards with the EL Support Lesson: Add Them Up!

Use these vocabulary cards with the EL Support Lesson: Addition Problem Solving.

Use addition and subtraction to find the correct path through the puzzle.

Learn how to use doubles facts to solve other addition problems!

Children use their addition skills to decode a puzzle in this fun math exercise.

Use these vocabulary cards with the EL Support Lesson Plan: Adding Within 20.

Use these vocabulary cards with the EL Support Lesson Plan: Fact Family Triangles.

Use problem solving and critical thinking skills to find different sums in these puzzles.

Use this number line as a tool to practice adding and subtracting within 20.

Use math to construct a thriving city in this colorful worksheet for second graders!

Use your addition skills to build your own number city in this unique worksheet!