Know a place to get discount Broadway tix?

I'm looking to get tickets for my mother and I to go see Movin' Out after Christmas. We both work in school so we can go to the Wed. matinee. Without my father, who passed away a year and half ago, Christmas is such a sad time for her. I thought this would give her a fun day out with me!

Where can I find discount Broadway tix? Anyone know of a good place?

Thanks!

The TKTS booth in Times Square has half price tickets only on the day of the show. Basically you get there at around lunch time, see what they have for that night, and generally there are orchestra seats for 1/2 price. Then its fun to go shopping, dinner, and then the show. Usually most of the top Broadway shows are up there, but as it gets closer to the holidays, it might be harder to get tickets.

Also, they have discount coupons in most schools... if you know anyone who is a teacher have them check their schools to see whats available.