Answer: Reaction papers are often used as tools in a class-setting to encourage students to think critically about texts, and how those texts are in conversation with each other, or with a wider field of discourse. Reaction papers can also be used to generate ideas for a research paper.
Explanation: This type of writing allows writers to articulate their opinion about issues familiar and relevant to them. Reaction papers/reviews/critiques allow writers to express their views, enabling others to share their point or a contrary viewpoint.