South Dakota Standards
SD.4.A. Algebra: Students will use the language of algebra to explore, describe, represent, and analyze number expressions and relations that represent variable quantities.
4.A.3. Interpret and develop mathematical models.
4.A.3.1. Application: Students are able to write and solve number sentences that represent one-step word problems using whole numbers.
4.A.3.1.a. Use multiple methods, such as physical models, tables and charts, the number line, and graphs.