What is the likelihood that a polar bear will walk into the classroom? Students will consider this and other events using the concept of probability and the terms: Impossible, unlikely, likely, and certain.

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.

In this leafy, plant-themed lesson, students will use leaves as they practice recognizing various numbers from 1 to 15. This lesson can be easily adapted for use with specific ranges of numbers.

Use this ocean-inspired lesson plan to practice using one-to-one correspondence with your students. This can be used as a stand-alone lesson or support lesson for the Matching Numbers lesson plan.

Bigger, taller, shorter, or longer? In this spring lesson plan, students will compare two objects and create their own spring-themed comparison worksheet. They will draw pairs of pictures and come up with their own comparison questions.

Help students visualize the missing addend in an addition problem with this fun game. Use this scaffolded EL lesson alone or for more practice before teaching the Mystery Addends: Representing Word Problems lesson.

Use your students' fascination with sharks to create a math feeding frenzy! Students will match numerals to quantity using "shark teeth" in this sensory rich math lesson.

Students put their understanding of one and 10 more to work as they write word problems for classmates to solve. This lesson plan can be used alone or with Picture Addition.

Keep students engaged and help them practice their counting fluency with this fun, game-based lesson. Students count and work with each other to create the classroom’s longest number snake. Who will be the winner?

Slice those pieces and mix it up! In this lesson that follows “Slice It Up! Part One,” students will begin recognizing different ways to create equal shares in whole shapes, creating a fraction poster by the end of the lesson.

Perpendicular, intersect, parallel! In this lesson, students work in teams to complete a Frayer Model on each of these terms to become masters of geometry vocabulary. Teach this lesson on its own or as support to the lesson What's My Line?

More or less? In this hands-on lesson, your students hone important fine motor skills and learn how to compare quantities.

Festive fall decorations will fill your classroom after students complete these pattern-filled turkeys!

Emphasize student understanding and reasoning! This lesson plan helps learners solve story problems using sense-making strategies. This can be used alongside the lesson Solving Word Problems or as a stand-alone lesson.

Fill ‘em up! This lesson teaches students to compare how much different containers can hold. Get ready for some overflowing fun!

Help your students find their fraction families with this lesson that sends them searching for their equal fraction pieces!

This lesson helps students review rounding to the nearest hundred. Your students will practice rounding using manipulatives.

Help your students discover patterns when multiplying by five.

Make multiplying by powers of ten more accessible to your students by focusing on patterns in the number of zeros!

Teach your students to calculate fractions of 100 using a number line model.

Students sketch base-ten blocks in this lesson that builds both number sense and fluency adding to 20!

Teach your students to add and subtract time using number lines. Your class will be gladly moving backwards and forward to the minute solving for related word problems.

Students will learn out how to partition a rectangle using by partitioning shapes with rows and columns.

This Halloween-themed hundreds chart game has plenty of tricks and treats! Students will roll two dice to move up and down the chart to be the first to 100. Players will also recognize important number patterns as they move their marker.

Students will begin to calculate volume of different rectangular prisms using base ten cubes and then transition to using the formula V = L x W x H. Students will then practice using the legendary fifth grade activity, Cootie Catchers.

Delicious multiplication! In this sweet lesson, your students will learn how to relate multiplication to repeated addition using candy counters.

Your students will have fun working with numbers to 20 with this exciting and interactive lesson with music, movement, and hands-on experiences!

This lesson is designed for fourth graders to practice their skills with the order of operations along with multiplying fractions and adding or subtracting decimals.

Teach your students four simple steps to help them solve multiplication and division word problems with confidence.

Make subtraction delicious with this fun "fishing" game! Learning to take away will be delightful when your students fish for goldfish crackers.