“Don’t just do something, stand there.” That’s a line Dr. Bill McCallum, one of the writers of the Common Core State Standards, used in his presentation at the California Algebra Forum in San Jose, CA, which I attended last week.

Dr. Bill McCallum, one of the writers of the standards, used the line, “Don’t just do something, stand there,” when introducing the Standards for Mathematical Practice. He described a how he uses this line frequently in his teaching and it immediately struck a chord with me.