You can't revise the Theory of the Firm topic without having a good grasp of the cost and revenue diagrams. In fact, for Year 2 micro, there's nothing more certain to turn up on the exam!

Here's a fun way to test student knowledge in class. The resource here is called 'Diagram Draw' and gives the students 7 TOTF diagram titles. A clock on the screen gives the chosen student 1 minute to draw the diagram that matches the title. The Powerpoint file uses a little trickery to change the mouse pointer into a coloured pen and the student can draw on screen to the full delight of the rest of the class! When completed, a 'teacher' version of the diagram can be displayed and a discussion about the differences can be had if necessary.