In this unit, students will identify and work with bills and coins (quarters, dimes, nickels, and pennies) in whole number amounts. They will use physical and pictorial representations and employ skip counting strategies on number lines. Students will identify and represent the same amounts of money in different ways. Throughout this unit, students will solve realworld problems using their understanding of addition and subtraction to put together and take apart amounts of money. Students may struggle with understanding that one coin can represent a value greater than one (e.g., one nickel has a value of five cents), and may believe that coins that are physically larger necessarily have a greater amount when compared with coins that are physically smaller. While students are representing dollars and cents using the $ symbol (i.e., $3.75), decimals are not introduced until fourth grade. Because this unit is addressed relatively early in the school year, teachers may use money as a context for numbers and within story problems in later units.
Key Concepts:
 Different denominations of currency represent different amounts of money: dollar bills, quarters, dimes, nickels, and pennies.
 We can make the same amounts of money using different combinations of bills and coins.
 We can use addition and subtraction to put together and take apart amounts of money.
Prior Knowledge Needed:
 There are coins and bills, we use coins and bills to pay for/buy things
 Skip counting by 1’s and 10’s
 Put together numbers to make the same sum (e.g.: 12+8=20 and 10+10=20)
 Mentally adding and subtracting tens and other amounts within 20
 Solve 1 and 2step story problems
Units on the Horizon:
 Understanding three digit numbers (Grade 2, Unit 6)
 Expressing and Comparing 3digit numbers (Grade 2, Unit 7)
 Relating skip counting to mental addition and subtraction (Grade 2, Unit 8)
 Demonstrating fluency in addition and subtraction (Grade 2, Unit 15)
Lessons

Lesson objective: Students will be able to identify the values of bills and coins and count them using what they know about adding whole numbers. Students bring prior knowledge of groups of objects that have a value (e.g., this group has five stars, so ...

Lesson objective: Solve problems involving coins. This lesson helps to build fluency with recognizing and understanding coin values, as well as how to trade coins with lesser values for a coin with a greater value (e.g., five pennies for one nickel). A ...

Lesson objective: Skip count groups of dollars and coins. This lesson helps to build fluency with finding a total amount of money by skip counting dollars and coins by their values. Number lines are used here because students can track the value of the ...

Lesson objective: Understand that we can show the same value of money using different groups of coins. Students bring prior knowledge of the values of dollars and coins and counting groups of money from 2.MD.C.8. This prior knowledge is extended to show...

Lesson objective: Identify and create different combinations of dollars or coins that make the same amount of money. This lesson helps to build fluency with identifying and creating equivalent amounts of money. Skip counting on number lines is used here...

Lesson objective: Apply understanding of how different monetary combinations make the same value in order to solve a story problem. This lesson provides an opportunity for students to apply their knowledge and understanding of making equivalent amounts ...

Lesson objective: Students will be able to use addition and subtraction to solve money story problems. Students bring prior knowledge of adding and subtracting to solve story problems from 2.OA.A.1. This prior knowledge is extended to using addition and...

Lesson objective: Solve problems that require addition to put together amounts of money. This lesson helps to build fluency with solving addition money story problems. Place value strategies (adding tens and ones, skip counting tens and ones on a number...

Lesson objective: Solve subtraction money problems using place value strategies. This lesson helps to build fluency with using place value strategies to solve subtraction money problems. Number lines and equations are used here because this supports the...

Lesson objective: Use addition and subtraction to solve twostep money story problems. This lesson provides an opportunity for students to apply their knowledge and understanding of add and subtracting money amounts to a reallife situation. Students wi...