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- 2.NBT.A.1Understand that the three digits of a three-digit number represent amounts of hundreds, tens, and ones; e.g., 706 equals 7 hundreds, 0 tens, and 6 ones. Understand the following as special cases:
- 2.NBT.A.2Count within 1000; skip-count by 5s, 10s, and 100s.
- 2.NBT.A.3Read and write numbers to 1000 using base-ten numerals, number names, and expanded form.
- 2.NBT.A.4Compare two three-digit numbers based on meanings of the hundreds, tens, and ones digits, using >, =, and < symbols to record the results of comparisons.

Before or After

2nd Grade Math

Â» Unit:

Each Number Has a Place

Big Idea:The big idea of this lesson is number pattern recognition and the use of positional words "before" and "after" to describe the location of a number, in relation to other numbers.

Go Fishing for Doubles

2nd Grade Math

Â» Unit:

The Mission of Addition

Big Idea:Students play a favorite card game which practices the quick and accurate recall of double facts.

Skip Counting with 5s, 10s and 100s

2nd Grade Math

Â» Unit:

Adding and Subtracting the Basics

Big Idea:In preparation for multiplication, the Common Core Standards require 2nd grade students fluently skip count by 5âs, 10âs and 100âs.

Rain Forest Gems of Biodiversity

2nd Grade Science

Â» Unit:

The Wonderful Biodiversity of Life

Big Idea:"Gems of Biodiversity" is a great visual tool to help children grasp the idea of biodiversity in the rain forest. It can also be used to help the children understand relationships and as a springboard for an exercise in reasoning.

Desert Gems of Biodiversity

2nd Grade Science

Â» Unit:

The Wonderful Biodiversity of Life

Big Idea:"Gems of Biodiversity" is a great visual tool to help children grasp the idea of biodiversity of the desert. It can also be used to help the children understand relationships and as a springboard for an exercise in reasoning.

Tallying it Up

2nd Grade Math

Â» Unit:

Numbers & Operation in Base Ten Grade 2

Big Idea:In this collaborative lesson students will use "Head, or Tails" to learn how to tally count by fives and add on left over numbers.

Moving Along In Hundreds

2nd Grade Math

Â» Unit:

Everything In Its Place

Big Idea:The Common Core standard is that students understand that the numbers 100, 200, etc. represent so many groups of 100.

Coral Reef Gems of Biodiversity

2nd Grade Science

Â» Unit:

The Wonderful Biodiversity of Life

Big Idea:"Gems of Biodiversity" is a great visual tool to help children grasp the idea of biodiversity of coral reefs. It can also be used to help the children understand relationships and as a springboard for an exercise in reasoning.

From Tens to Nines

2nd Grade Math

Â» Unit:

Adding and Subtracting the Basics

Big Idea:Fluency in adding and subtracting is expected during second grade. New strategies to add and subtract efficiently provide students with a variety of options to increase fluency.

The Trading Game

1st Grade Math

Â» Unit:

Money!

Big Idea:Students will play the trading game but with an added twist.

Skip Counting Patterns

2nd Grade Math

Â» Unit:

Numbers Have Patterns

Big Idea:Are there repeating patterns in number counting? Recording skip counts may help reveal patterns that can be used in solving later math problems.

Our Strategies for Result Unknown Problems

2nd Grade Math

Â» Unit:

Three-Digit Addition and Subtraction

Big Idea:Students identify, use, and share their strategies for result unknown word problems.

Woodland Gems of Biodiversity

2nd Grade Science

Â» Unit:

The Wonderful Biodiversity of Life

Big Idea:Back it up? You bet! In this lesson your students will use a model to explore the animals in the woodlands. Then they will make predictions and back up their reasoning.

Making Change

2nd Grade Math

Â» Unit:

Everything in Its Place

Big Idea:Skip counting is important in the development of fluency in calculation, number sense and as the basis of multiplication and division.

More Dimes and Dollars

2nd Grade Math

Â» Unit:

Everything in Its Place

Big Idea:Students need practice using coins and dollars and relating them to ones, tens and hundreds. Common Core standards include counting by 10s and 100s.

2.NBT.A.1

Understand that the three digits of a three-digit number represent amounts of hundreds, tens, and ones; e.g., 706 equals 7 hundreds, 0 tens, and 6 ones. Understand the following as special cases:

2.NBT.A.2

Count within 1000; skip-count by 5s, 10s, and 100s.

2.NBT.A.3

Read and write numbers to 1000 using base-ten numerals, number names, and expanded form.

2.NBT.A.4

Compare two three-digit numbers based on meanings of the hundreds, tens, and ones digits, using >, =, and < symbols to record the results of comparisons.