Sydney readies to perform a Romeo and Juliet scene for Dr. Thornhill's approval. This suggests that Dr. Thornhill teaches either English or drama as well as math and science. Only a vice principal and he have ever been seen as the faculty of Copper Canyon High School. As no more than twelve students ever show up at any given time, it's a wonder Dr. Thornhill and the VP don't run a one-room school house rather than the extra wide, sparsely populated hallways of their multi-storied high school. (A coach character will appear later in Turbolt the Terrible.)
The Elementors achieved their independence in Hot Zone, but now they're merged once more.