I have developed an index of my teaching ability. It consists of a sleep counter (number of students that nod off), a boredom indicator (number of students that have decided that the construction in the building outside is more interesting that introductory macro), a confusion measure (number of students that have a look of either a bad wedgie or a itch in the inner ear) and a participation share (number of students that voluntarily respond to questions without the need for me to resort to the roster). According to this index, my teaching definitely needs improvement (I think my level may lie somewhere between Arnie S. talking about raising taxes in California and John Ashcroft discussing the merits of abstention before marriage). So... could be worse, but could be better, I suppose.