2829 - Connect with the Bali Batim, make sure not to diminish the respect of the local Rabbi.

You do not write all the reasons so I cannot give you a definitive answer. However consider that bringing in 9, 10 and 11 year olds into a yeshiva would affect the image of the Yeshiva. https://www.torahrecordings.com/rebbe/igroskodesh/009/011/2829