## 2nd Grade Formative Assessment Lessons

## Two-Digit Addition, Mental Math

This lesson is intended to help you assess how well students are able to fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or relationships between adding and subtracting. It will help you to identify students who have difficulty recognizing place value of ones, tens, and hundreds, understanding the commutative and associative properties as they relate to the numbers used in addition and subtraction equations, and applying efficient strategies (especially strategies based on place-value, properties of operations, and the relationship between addition and subtraction) to add and subtract fluently.

This lesson involves

This lesson involves a range of

This lesson involves

*mathematical content*in the standards from across the grades, with emphasis on:**Number and Operations in Base Ten 2.NBT: Use place value understanding and properties of operations to add and subtract.**This lesson involves a range of

*Standards for Mathematical Practice,*with emphasis on:**2. Reason abstractly and quantitatively. 7. Look for and make use of structure.**## Place Value - What's the Value of Place?

This lesson is intended to help you assess how well students are able to recognize the value of the place in a number. It will help you to identify students who have the following difficulties:

Recognizing place value of ones, tens, hundreds.

Use correct mathematical vocabulary to explain place value to a partner.

Make connections of place value to previously taught lessons.

This lesson involves mathematical content in the standards from across the grades, with emphasis on: Number and Operations in B

This lesson involves a range of Standards for Mathematical Practice, with emphasis on:

Recognizing place value of ones, tens, hundreds.

Use correct mathematical vocabulary to explain place value to a partner.

Make connections of place value to previously taught lessons.

This lesson involves mathematical content in the standards from across the grades, with emphasis on: Number and Operations in B

**ase Ten 2.NBT Understand place value**.This lesson involves a range of Standards for Mathematical Practice, with emphasis on:

**2. Reason abstractly and quantitatively. 7. Look for and make use of structure.**__Formative Assessment Lessons written by other organizations__

## Carol's Numbers written by New York City Dept of Education

The mathematics of the unit involves understanding the meaning of base ten and using that understanding to solve number and real life problems. The number line is used as a tool to help articulate understanding of base ten and to solve problems using addition and subtraction of numbers less than one hundred. The big idea is for students to understand and use groups of ten. Strategies will involve applying number properties including distributive, associative, and commutative. The Formative Assessment Lesson is embedded in the unit and can be found on page 38.

This Formative Assessment Lesson relates to the following Common Core State Standards:

Second Grade Number and Operations in Base Ten: Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.

Second Grade Number and Operations in Base Ten: Explain why addition and subtraction strategies work, using place value and the properties of operations.

This Formative Assessment Lesson relates to the Mathematical Practices: Modeling: Mathematically proficient students can apply the mathematics they know to solve problems. This might mean at early grades being able to write an equation or problem to demonstrate a situation. Constructing Viable Arguments and Critiquing the Reasoning of Others: At the early grades, this might mean that students can compare their results with others. They might find ways to order and/or generalize about solutions. Others may find more than one solution path to a given problem.

This Formative Assessment Lesson relates to the following Common Core State Standards:

Second Grade Number and Operations in Base Ten: Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.

Second Grade Number and Operations in Base Ten: Explain why addition and subtraction strategies work, using place value and the properties of operations.

This Formative Assessment Lesson relates to the Mathematical Practices: Modeling: Mathematically proficient students can apply the mathematics they know to solve problems. This might mean at early grades being able to write an equation or problem to demonstrate a situation. Constructing Viable Arguments and Critiquing the Reasoning of Others: At the early grades, this might mean that students can compare their results with others. They might find ways to order and/or generalize about solutions. Others may find more than one solution path to a given problem.