Please send your comments, suggestions &/or criticisms to Scott at ermtech~AT~hstech.org
If you understand the subjects covered here, you should have no trouble on any of the theater tech exams.
If you find that you need a bit of extra help to better understand anything here, please find me, during a free period, and I'll be glad to help you. To make our time more productive, you should write out the problem, write out any formulas shown here and bring any scratch paper you used while attempting to solve your problem.
Just a reminder: Don't think too hard. This stuff is NOT brain surgery!