I am not a maths teacher so have no idea how to work this out. I used two methods of teaching (A and B) to teach my 70 students.

I then asked the students 50 multiple choice questions on material taught with each method; each question had 5 possible responses.

The total number of correct responses from students who were taught with method A was 3149. (out of a possible 3500 correct responses if each student had obtained the correct answer to each question)

The total number of correct responses from students who were taught with method B was 2449.

Is this more than chance or can I say that one method of teaching is superior to the other? How can I give this statistical meaning?

If anybody can help I would be most grateful.