Using base ten blocks and place value, students explore how to become more fluent in adding and subtracting two-digit numbers without regrouping.

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

Students practice skills of addition, subtraction, word problems and graphing and develop their own theories about why meat consumption is so different across the world.

The big idea of this lesson is that three (or more) numbers can be grouped together and added. The order of this grouping doesn't matter.

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

To make sense of numbers in the thousands, 2nd grade students need practice identifying place value positions and using place value strategies in numbers to 1,000.

Students are expected to fluently multiply and divide within 100. This allows students to practice their math facts and then check their work using area models.

Using a mathematical model, students will be able to visually see the process of how to multiply a fraction by a whole number to find its product in order to gain a deeper understanding to ultimately be able to do it on their own.

Numbers don't stop at 20! We spend the last week or so of school looking at the numbers beyond 20.

The long and the short of it... In this introductory lesson to ordering lengths, students will be able to compare objects by length using the vocabulary longest and shortest.

Numbers don't stop at 20! We spend the last week or so of school looking at the numbers beyond 20. Today we do it by looking at the number line.

Operation Independence! Students will now take what they have learned from previous data lessons and put it into action. The students will work in pairs of two to decide on a survey question and then collects classmates' responses to their question

This lesson is an informal assessment of student understanding of the base ten system, a critical area in the Common Core.

This lesson builds a foundation for adding larger numbers which is supported by the Common Core standards for second grade.

Patterns are everywhere. We can use patterns to help us deal with larger numbers

Are there patterns in nature that can be described by numbers? That is what we will find out here.