Two immediately come to mind.

Mrs. McCann was my maths teacher in years 7-9 and like Pike's math teacher in the OP, she was amazingly gifted at explaining things. She kept classes interesting and challenging but without being too much, and thanks to her I grew from being good at maths to amazing at it.

Mrs. Hunt was my English teacher from like Year 10 until I finished Sixth Form and is my favorite teacher ever. Oh she was so wonderful. It's hard to describe just what it was that was so great about her but she just had this way that made everything intuitive and easy to understand and we swooned together over how gorgeous Marlon Brando was as a young man.