6th grade social studies teacher.
There was nothing outright sinister about her, but she had a very strange, elongated face. Everything about her was long. She was skinny and tall, but her limbs seemed to stretch further than they should have. She wore glasses that did not flatter her long head.
She had an awkward way of speaking, too. It was halting, lilting version of English, where she would rise up on certain syllables toward the start of the sentence and end on a lower register at the end. "O-kay, stu-dents, today we're going to learn a-bout the religion of Islam. Italics are high note, bold are low note. I was convinced she was from Jupiter or something like Will Smith's teacher in Men in Black, like she had settled on a mostly human form, but was still having trouble nailing down the subtleties of human language and behavior after her time on Earth.
She did sponsor an elective field trip with our parents on the weekend to our cemetery here in town (supposedly one with the biggest, most historic cemeteries in the region) and we did charcoal rubbings of the cool headstones.
Also my 11th grade geometry teacher. He was just all about business and didn't tolerate bullshit, but wasn't mean or anything. He seemed like a perfectly nice guy aside from the fact that he looked like a short troll. I feel bad saying it but it was the closest I could get to describing him. Small, stooped when he stood, large, hooked nose and bald head, and had a strangely nasal voice. The quintessential male high school math teacher. Sidenote: my super Christian classmate told me that he went to the same church as Mr. Teacher and he had beautiful singing voice. It humanized him. He was cool but just looked weird.