When a student fails to perform as we think he should, it is often easy to make sharp comments, hoping to motivate that student to meet our expectations. Criticism, which reaches beyond reproof, and correction prompted by exasperation thwart education. Criticism is a hindrance, not a help, to both teaching and learning.
Students reflect their teachers.
Students disappoint teachers displeased with them. Criticism directed at one pupil is received by the entire class. Self-criticism should take place before the criticism of others. A critical spirit modeled by a teacher will be followed by some students. Criticism can inhibit positive performance.