My students seem to think that it is much easier for me to find their errors than it is for them to find them on their own.
Well of course it is. Anytime you can get someone else to do the work for you, it is easier. Also, I’ve had lots and lots of practice in trying to find the mistakes in other people’s work.
So in an effort to get them to be able to find their own mistakes, I created a systems of equations “find the error” worksheet.

Nothing fancy, but here’s the .doc file in case anyone is interested.
Categories: Math
Tagged: error analysis, systems of equations
Yesterday I had a sub for my last two classes of the day. My lesson plans were for the most part the same as they would have been had I been in class – a form of “In your groups compare your results from last night’s assignment and then begin working on the new task”. The only difference was that I held off on the whole class discussions until today.
So, today each group was assigned one problem to present to the class. This went well, the kids explained their work. Other kids asked questions. Others shared alternate methods. I asked a few clarifying questions – of both the people presenting and the people in the audience.
Then a strange thing happened 8th period. As a student is explaining both the math and the thought process behind each step, he is pointing to the screen. This isn’t the strange part. What I found strange were “… and then she…” and “… here she wrote… “. Finally I had to stop him.
“Who is this “she” you keep referring to?”
He points to one of his group members.
“Why are we looking at her paper?”
He states that her work is easier to follow.
“Humor me and toss your paper up there.“
He does.
Blank.
Categories: Math
Tagged: groups, homework