Also don't be afraid to say you don't know the answer to something - I'm a science teacher so often get crazy off topic questions, the advice I gave my prac student was to say something like "that's an interesting question and I'm not sure but can you research it tonight and let me know what you find?" Or "that's a good question, let me ask one of the other teachers after class and get back to you next lesson".
What was it about your lesson that you think sucked?
Me - 30, Dh - 38 ttc #1 since June 2011
natural bfn June 2012 - mc 5.5 weeks; 4 cycles clomid; 1 unsuccessful ivf.