Final answer:
False. Students do not only practice treading water during the Swim School green stage. There are other skills and techniques that students also learn.
Step-by-step explanation:
False. Students do not only practice treading water during the Swim School green stage. While treading water is an important skill to learn, there are other skills and techniques that students also practice during this stage.
For example, during the green stage, students typically learn to perform different swimming strokes such as freestyle and backstroke. They may also learn basic diving techniques and how to properly breathe while swimming.
Therefore, treading water is just one component of the overall curriculum during the Swim School green stage, but it is not the only skill that students practice.