Susan Gilkerson, a math teacher and school bus driver, stood before a South Dakota education board and issued a warning. The proposed math standards the board was considering — just 36 pages, less ...

👉Learn how to solve a system of equations by substitution. To solve a system of equations means to obtain a common values of ...

There are a lot of ways that students can make mistakes when solving a system of equations but in this video I am going to ...

Model math standards produced by conservative education advocates helped spark a battle in South Dakota that could spread to other states.

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