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.