A funny thing happened today on the way to basic linear equation and function skills today in Algebra 1:
students started using precise mathematical language without my having to prod them.
First, a student demonstrating a problem at the board announced matter-of-factly, "Well, first you use the distributive property, making sure not to drop any negative signs. Then you add '2x' to both sides of the equation."
I almost swallowed my own tongue.
Stop, children, what's that sound... everybody look what's going down...