1. Establish a cooperative relationship: The swimming pool wants to establish a long-term cooperative relationship with the school. The recommendation of the school can increase the popularity and reputation of the swimming pool. At the same time, schools can also get some benefits from cooperation, such as providing more sports opportunities for students or giving certain discounts.

2. Provide security: Swimming is a sport, which involves water safety. The swimming pool may hope to attract more students to take swimming lessons through the recommendation of the school, which can improve students' safety awareness and water skills and reduce the occurrence of water accidents.

3. Convenient management: The school as a whole has a relatively centralized management and supervision mechanism. Swimming pools may cooperate with schools to manage students' registration and course arrangement more conveniently and reduce the complexity of management.

4. Increase customer resources: the school has a large number of student resources. If you can get the recommendation from the school, the swimming pool will attract more potential customers and increase the passenger flow and income of the swimming pool.

In short, the recommendation of the school may be considered by the swimming pool for the purpose of establishing cooperative relationship, providing security, facilitating management and increasing customer resources. At the same time, there may be other considerations for the specific reasons.