Start your students on subtracting three-digit numbers with this lesson that breaks the problems down by place values!

Teach your students to add and subtract fractions with like denominators using a strategy that works for both operations: converting mixed numbers into improper fractions and back again!

Finding the least common multiple is an essential skill for comparing, adding, and subtracting fractions! This lesson introduces students to this concept in an interactive way.

Adding fractions with unlike denominators just doesn't work like it does when the denominators are the same. Let's make it work! Students will add fractions with unlike denominators with sums between one and two.

This lesson will help students build an understanding of multiples as they learn how to subtract from multiples of 100!

Getting ready to subtract fractions? This lesson reviews how to subtract like denominators and teaches students how to subtract unlike denominators. The focus is on understanding the process and reasoning behind each step.

In this lesson, students will learn how to add a one-digit number to a two-digit number. This will help students build upon the skills needed for regrouping larger numbers.

It's as easy as one, two, three...four! Introduce your students to subtracting decimals in the tenth and hundredth place using a four-step process.

Teach your students to subtract mixed numbers with like denominators using the strategy of decomposition. This strategy helps students to manipulate and break down numbers to help them solve tricky subtraction problems.

Getting ready to add fractions? This lesson reviews how to add fractions with unlike denominators using number lines. Students will focus on understanding the process and reasoning behind each step.

Get ready to do some shopping! In this lesson, students will learn about subtracting 100 from multiples of 100 when making big purchases.

Make the number work for you! Use this lesson to teach your students to add mixed numbers with like denominators using the strategy of decomposition.

In this lesson, students will practice strategies of subtracting time and apply them to real life scenarios. Also, use this game with the lesson that teaches addition of elapsed time called Beyond Just Addition.

High order thinking skills are critical skills for students of all ages. In this lesson, your students will create word problems about money.

This lesson combines three essential skills in one entertaining game! Students will need to add, subtract, and understand place value with decimals.

Fractions are everywhere! In this hands-on lesson, your class will work together in groups to find real-world examples of fractions. As they discover more complicated fractions, students will create their own word problems with them.

Refresh students on the relationship between decimals and fractions when they multiply to find the area! They will find the area of a location in a picture by converting mixed numbers to a decimals and then using the area equation.

Help your students subtract with confidence by sharing two different strategies. Use this lesson to build on students’ understanding of subtraction and to evaluate this key skill.

Teach your students to add mixed numbers and improper fractions with the same denominator using the counting up strategy with number lines.

Use this lesson to review three-digit addition strategies including base-ten drawings, number lines, and the standard algorithm.

Help! The numbers in our equations have run away and left their answers alone! In this lesson, students will review their math facts and knowledge to solve Ken Ken like puzzles and bring the numbers back to their places.

Give your students a conceptual understanding of three-digit addition with this lesson focused on base-ten blocks and drawings.

Teach your students to find the perimeter of polygons using real world examples. They will make polygon pictures using tangrams and practice finding the perimeters of the polygons in their masterpieces.

Input some patterns to T-charts in this lesson. Use this lesson about input and output boxes as a precursor to finding patterns within word problems.

Teach your students to draw an array using base ten notation to solve multiplication problems with two two-digit factors.

In this interactive lesson that includes the use of clock manipulatives, students will discover that addition goes beyond straightforward addition problems. Finding the elapsed time is easy with addition!

Double-digit trouble? No problem! Your students will practice their decomposing and regrouping skills in this lesson.

Using your acting skills and a great book by Chris Van Allsburg, you will lead your students on an adventure to compare characters and events throughout a book.

In this lesson, students will add three-digit numbers using expanded form addition and standard algorithm addition. They'll explain their answers and highlight the steps for each of the strategies.

Let's solve multi-digit division problems! Students will feel more confident with their division than ever with this lesson that helps them practice dividing multi-digit numbers.