Unit 7, section B of your text book taught you how to ask for give refuse permission. Read the example then write appropriate expressions _two each _one for giving permission and one for refusing permission

Not sure exactly what you are asking for, but when you refuse permission, an appropriate response would be:

"I do not wish for my child to participate in today's events as I do not feel it will benefit his learning."

A good response to give permission:

"I give permission for my child to participate in today's events."