Final answer:
Initial impressions of students should be treated like preconceived notions.
Step-by-step explanation:
When a teacher forms initial impressions of students, it should be treated like preconceived notions. Preconceived notions are biased thoughts based on flawed assumptions about a group of people. These initial impressions may not be accurate or fair to the students, as they are formed without complete information. Therefore, it is important for teachers to be aware of their preconceived notions and strive to have an open mind when forming opinions about their students.