My mother still tells the story of her precocious second grader informing the teacher that the sun is a star.
My third grade teacher taught us that the earth rocked back and forth to create the seasons, as in, the axis of rotation actually shifted back and forth.
She was a nice lady and a good teacher, but I use that illustration with my kids to show that they shouldn’t take everything an authority figure tells them at face value. When in doubt, ask questions of other sources.