The ConcepTest is displayed on a screen using an overhead projector.
Students vote on their answer using a show of hands.
Then there is a one-minute pause while students attempt to convince their neighbor that their answer is correct, after which the students vote again. The answers do not count toward the grade, but are feedback for me. The issue to be addressed is that the students often can manipulate the equations, but often have misunderstandings of the basic concepts. The ConcepTest must be answered using the basic concepts, but cannot be solved by an equation. After receiving my doctorate and moving to the other side of the desk, I wanted to do my share to continue spreading such a wonderful approach and in the early years it seemed rather easy to do so.