In an advanced technical and professional writing course, a pair of in-class exercises integrates the teaching of teamwork with other class topics of project management and observation-based research. The first exercise introduces teamwork in a positive way, by raising awareness of strategies for solving problems successfully. The second exercise follows up on the first, focusing on assessment of problem-solving teamwork. The pair of exercises is memorable and effective, showing students in an engaging, thought-provoking way that they have control and responsibility for the success of their teamwork. The materials for conducting the exercises, provided here, encourage reflection and discussion.