## Operations and Algebraic Thinking Stations

Learning stations for operations and algebraic thinking (OA) might focus on the following areas.

**Kindergarten -**

- Understanding addition as putting together and adding to and subtraction as taking apart and taking from

- Decomposing numbers to 10

- Pairs of numbers that make 10

- Fluency: Add/subtract within 5

**First Grade -**

- Solving addition and subtraction word problems within 20

- Applying properties of operations to add and subtract, and understanding the relationship between addition and subtraction

- Using strategies to add and subtract: counting on, making 10, using the relationship between addition and subtraction, and decomposing numbers to make easier or known facts

- Understanding the equal sign

- Fluency: Add/subtract within 10

**Second Grade -**

- Solving one- and two-step word problems to 100

- Using mental math to fluently add and subtract within 20

- Odd and even numbers

- (Later in the year) Using addition to figure out the number of items in arrays

- Fluency: Single-digit sums and differences (memory) and add/subtract within 100 (paper and pencil)

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