Derek is a third-grade teacher who believes that he should accept his students regardless of their behavioral shortcomings. Derek's attitude toward his students is an example of Carl Rogers' concept of

unconditional positive regard

Explanation:

Unconditional positive regard -

The concept is given by the psychologist Carl Rogers,

According to this concept, the people need to be accepted, cared and supported even if the other person neglect to do the same, is the unconditional positive regard.

i. e., to be really positive and caring towards other rather than how they treat you.

Hence, Derek attitude is the same with the children, and therefore showing the unconditional positive regard.