Well to start with Dracula doesn't have a thing to do with this movie (Teenage Dracula would have been a cool title). The producer, Herman Cohen was 27 when he did this one. He also did Teenage Frankenstein and I Was A Teenage Werewolf.
Six weeks after her mother dies a girl's father marries a blonde bimbo. Stepmom has the kid sent off to a school for girls. She doesn't really fit in. As usual in these 1950's programmers there is a teacher that hypnotizes her for some ludicrous theory of supernatural power for the benefit of mankind. Well the girl turns into a vampire. She has pointy ears, a widow's peak,pasty face,pointy teeth and a pointier sweater. (Hmm, I think I went out with her in college). Actually the vampiric makeup is quite effective and no doubt caused a few chills in a drive in in 1957.The killings begin and as usual the police are baffled.
At one point there is an impromptu pajama party crashed by some boys. One of them sings a horrible song called Puppy Love. Somebody rip his throat out now! Please! This has to be one of the worst rock and roll numbers done in a 50's horror film. (John Ashley comes close in "How To Make A Monster").
There is a lesbian undertone in the relationship between the science teacher and one of her other students. The student certainly worships the ground her teacher walks on.Pretty risque for 1957 or I'm just being dirty minded.
At the very least this is a nice example of trashy drive in cinema fun.