Mr. A is an incredible teacher. How many Biology teachers have actually been genetic counselors (although his daughter was born in the middle of the genetics unit, so he took off...but anyway). He took so much time with his students to make sure they understood the material. He taught AP biology to Freshmen and had a 2 week cram session at his house in the summer. If that's not dedicated I don't know what is. We had seven people, male and female, named Alex in the class that year, so sometimes he would call out "Alex!" and hoped one of them would answer. He nicknamed them too. My one friend who was a female Alex he nicknamed Fred. Funny, great teacher. He also did not care when I went to WDW middle of the school year (and is one of the few people who knew that I went there on a yearly basis).
I also had Mrs. A, though she wasn't nearly as good a teacher, though she's a very nice woman. 2/3 of the science teachers I had at DHS were excellent. Chem teacher was nominated for BCPS teacher of the year, and rightfully so.