Let’s start building numbers! Just as building skyscrapers is a visual representation of mathematics, students will use the visual representation of base-ten blocks to add—or build—onto a two-digit number.

Who doesn’t like to spend money and plan parties? Students will subtract two-digit numbers as they calculate the remaining money for their party supplies. They will subtract in multiples of ten and focus on place value.

What does it mean to expand a number? Use this lesson plan to help your students understand how to write the expanded form of two-digit numbers.

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.

Help your students make sense of the greater than, less than and equal to in this interactive lesson! Your students will have opportunities to compare either two-digit or three-digit numbers.

This quirky lesson will have young readers hungry to identify three and four letter words containing the digraph "th" in Eric Carle's classic The Hungry Caterpillar.

Dive deep into word problems with this lesson that teaches students to sketch base-ten blocks to add multiples of 10 and two-digit numbers. Use alone or with the lesson plan Let's Build It! Two-Digit Addition.

Build words with this fun lesson for emergent readers. Using beads and pipe cleaners, your students will enjoy working with manipulatives to create three- and four-letter words!

In this engaging, hands-on lesson, students solidify their understanding of place value by adding and regrouping two-digit numbers using M&Ms.

Introduce students to the quarter in this hands-on lesson. This is a great way to reinforce double digit addition.

Students get practice composing and comparing two-digit numbers as they compete to collect the most cards while playing the Hungry Alligator game. This lesson can be used alone or with the lesson plan Greater than Less Than Equal to Game.

Want a fun way to practice your math facts? How about with a St. Patrick's Day-themed variation of Go Fish! In this St. Patrick's Day lesson plan, students will create their own Go Fish! cards with addition math facts up to 20.

Your students will turn boring number sentences into fun, Christmas-themed word problems! They will get practice with math and writing as they use their creative juices to write and solve single digit addition word problems.

Double, double toil and trouble! Use two dice to roll up to 100 with one-digit sumations. In this lesson, students will play a place value game where they race to get to 100 by converting ones to tens.

Learning to quickly identify groups of 10 will be very helpful when your students begin working with multiple digit numbers. In this lesson, your students will work with manipulatives to make number pairs.

Get your students synthesizing various subtraction strategies as they work with a partner to solve word problems. This lesson can be used alone or with the lesson plan Show Me the Money! Two-Digit Subtraction.

Introduce hundreds place value to your students. Increase their knowledge of place value while they enjoy working with ones, tens and hundreds blocks.

Build a solid foundation in number sense with this lesson all about the friendly number 10! Students will count with both fingers and base-ten blocks. This lesson can be used alone or with the lesson plan Place Value Concentration.

Now that your first graders are able to count consecutively, introduce them to the tens and ones place values. Using tens and ones blocks will make math easy and fun for everyone!

What first grader wouldn't want ten dollars? This lesson uses one and ten dollar bills to teach students place value concepts as they develop fluency adding multiples of 10. Use alone or with the lesson plan Ten Time.

This bear-y fun lesson will help your students understand addition and subtraction and reward their efforts with a sweet treat!

Put your students to the test with this lesson that helps them learn the tens and ones places with a memory game and worksheet!

Students will play the card game War to learn about place value and comparing numbers using the terms "less than", "greater than", and "equal to".

Get ready to break the piggy bank! Students will use dimes and pennies in this hands-on lesson to solve for 10 more or 10 less than a given number. This EL lesson can be used alone or with the lesson plan Math Mind Magic.

Number facts are related, just like families! Help students learn all about fact families while they make fact family trees!

Students will get plenty of practice composing tens with ten frames to add to 20! Use this scaffolded EL Lesson alone or for more addition practice before teaching the Scavenger Hunt Addition lesson.

Build a strong foundation in place value with a fun game where students create groups of ten as they race to 100. Can be used alone or with the lesson plan Place Value Party.

Students will use their hands to mold clay into shapes, then divide those shapes into equal and unequal quarters.

Use this lesson to teach your students about the appropriate wardrobe for the different seasons. Also, teach them about the wonderful holidays of each season!

Discovery is exciting! In this hands-on lesson, your students will discover for themselves the rule behind the commutative property of addition.