Lesson objective: Students will be able to identify the names and values of US dollars and coins.

Students bring prior knowledge of groups of objects that have a value (e.g., this group has five stars, so we count the groups by fives) from 2.NBT.A.2. This prior knowledge is extended to understand that all coins and dollars have different values, as students identify the names and values of US dollars and coins. A conceptual challenge students may encounter is understanding that different coins have different values (and this does not depend on actual coin size - e.g., a dime is smaller than a nickel, but has a greater value).

The concept is developed through work with physical and pictorial representations of coins, which supports identifying the different values of US dollars and coins.

This work helps students deepen their understanding of numbers because students will use the values of dollars and coins to skip count groups of money and later solve money problems.

Students engage in Mathematical Practice 2 (Reason abstractly and quantitatively) as they make sense of quantities and their relationships to coin and dollar values. For example, students need to understand that one nickel is five cents, and be able to count nickels as fives.

**Key vocabulary:**

- amount
- coin
- dime
- dollar
- money
- nickel
- penny
- quarter
- value

**Special materials needed:**

- coins
- dollars
- hundreds grid
- number line