It was a teacher's dream. Ray Ulrich arrived last fall for his first day of class at Farragut school in Joliet to a classroom full of motivated students. But this wasn't a batch of fifth-graders. Instead, Ulrich, a teacher training specialist from the Teachers Academy for Mathematics and Science in Chicago, faced Farragut's own math and science teachers. His job was to help them improve the way they teach math to their elementary school pupils.