[BRL]

He doesn’t remove the mistakes because he want his students to know it is okay to make them. He does however correct them...and he does encourage his students to do the same.

He doesn't always catch them and correct them, but the few he missed in what I watched were obvious. They are always things like forgetting a minus sign or adding two numbers incorrectly.

[RoosterRedux]

Tell him in the comments below the video. It would help everyone.