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!

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 Plan: Adding Within 20.

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

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!

Let the construction begin! Learners will use number sentences to make buildings in this inviting addition worksheet!

Use critical thinking skills and a bit of addition to find the correct numbers and fill in this second grade worksheet.

Is your math whiz up to the challenge? She'll have to use logic and reasoning skills to solve this tricky addition puzzle!

Enjoy helping your little counter add up the values of these coins. He'll be learning an important skill he can use every day.

Use this handy graphic organizer to help students figure out how many parts make up a whole. Then they'll write out their answers using a helpful number words word bank.

It's time to check those addition skills! Use this to assess your student’s abilities to add within 20.

Did you know that multiplying a number by two is the same thing as adding that number to itself? Use this trick in this lovely math worksheet.

Know a second grader who could use stronger math skills? Give her a helping hand with this super power-infused, two-digit addition worksheet.

Your child will use his addition and subtraction skills in this Christmas word problems worksheet. Do some math at Christmas with this festive worksheet.

One way to find the missing number in an equation is to use a number line. Your kid will do just that in this set of addition problems.

Practice some merry math with these Christmas-themed word problems. Kids will use math skills to find the correct number of wreaths, carolers, and chocolates.

Use this Christmas word problems worksheet to strengthen your kid's math skills. This worksheet will prep your kid to do everyday math, even over winter break.

There are 10 gifts under the Christmas tree, but they're missing their colors. Your child will use his math and creative skills to color them in this worksheet.

Our combination math and color-by-number worksheet gets your kid to use both sides of his brain. It's Christmas and Santa needs help coloring in his gifts.

Use the worksheet, Holiday Shopping 2, to help your first and second graders practice adding or subtracting word problems. Learners will answer the problems and then discuss their answers with partners to show their understanding.

Sharpen second graders' hundred chart know-how with this addition worksheet!

Help your first and second-graders practice adding and subtracting with this holiday-inspired word problem worksheet. Use the Holiday Shopping worksheet to help your learners discuss their answers with partners as well.