We have a tendency to underestimate how long it will take someone else to learn something that we have already mastered.
An argument on flipped classrooms: Students have a much better grasp on what other students would struggle with compared to the teacher.
This curse is also the reason that it is so difficult to create fair exams.
Book - Make it stick.. the science of successful learning draws on an explanation by Eric Mazur (Harvard physicist and educator) As you get more expert in complex areas, your models in those areas grow more complex, and the component steps that compose them fade into the background of memory (the curse of knowledge). Mazur says that the person who knows best what a student is struggling with in assimilating new concepts is not the professor, it’s another student.
Empirical evidence for tapping music tunes: L. Newton, Overconfidence in the communication of intent: Heard and unheard melodies (Ph.D. diss., Stanford University, 1990).