What activity may be appropriate for teaching from the deck?

Teaching stroke evaluation from the deck is appropriate because it allows instructors to provide feedback to swimmers without requiring them to be in the water. This vantage point enables instructors to observe the swimmers' techniques closely, identify areas for improvement, and give constructive feedback in real time. By staying dry, the instructor can maintain a clear view of several swimmers at once, making it easier to assess their performance and provide individual critiques effectively.

In contrast, activities like water aerobics, general swimming skills, and rescue techniques involve direct interaction with the water. These activities typically require hands-on instruction, demonstrations, and immediate guidance, which are best conducted when the instructor is in the water with the participants. Thus, while those activities are essential components of aquatic training, they are more effectively taught through immersion rather than observation from the deck.