Which feedback example would most effectively support a student in improving their performance on a quiz?

The most effective feedback for helping a student improve their performance on a quiz is to explain the error made during calculations. This approach provides direct, specific information about what went wrong, allowing the student to identify their misunderstanding and correct it. By understanding the nature of their errors, students can learn from their mistakes, which is crucial for the learning process. This targeted feedback directly addresses the skills and concepts the student needs to analyze and improve upon, facilitating deeper comprehension and retention of the material.

In contrast, encouraging a student to redo the questions at home may not provide the immediate, constructive insight needed to understand the reasons for their errors. Rewarding effort with free time for participation might boost motivation but does not directly contribute to understanding the content or addressing misconceptions. Similarly, assigning practice problems as homework can be helpful for reinforcing learning, but without specific feedback on the original quiz errors, it might lead to additional practice without ensuring that the student understands the fundamental concepts that need improvement. Thus, providing clear explanations about mistakes offers the most valuable support in fostering student growth.