The curse of knowledge is a cognitive bias that occurs when an individual, who is communicating with other individuals, assumes they have the background knowledge to understand. This bias is also called by some authors the curse of expertise.
For example, in a classroom setting, teachers have difficulty because they cannot put themselves in the position of the student. A knowledgeable professor might no longer remember the difficulties that a young student encounters when learning a new subject. This curse of knowledge also explains the danger behind thinking about student learning based on what appears best to faculty members, as opposed to what has been verified with students.