A fourth-grade teacher observes that several students are upset about their mathematics grades. The students are receiving low grades on daily assignments and weekly quizzes, and some are beginning to show signs of low self-efficacy. Which of the following teacher actions will most help the students regain their self-efficacy?
A. Increasing the difficulty of assignments
B. Providing additional homework
C. Offering extra credit opportunities
D. Providing targeted support and encouragement
