Final answer:
The statement is True. Lack of discipline is rated as the second most important problem in schools, according to the most recent Gallup Poll.
Step-by-step explanation:
The statement is True. In the most recent Gallup Poll, the American public rated "lack of discipline" as the second most important problem in schools, after "lack of financial support." The Gallup poll is a widely recognized survey that measures public opinion on various topics. Lack of discipline in schools can have a negative impact on the overall learning environment and student achievement.