If a go with my son school class it will be the same price

Probably a little cheaper i believe they give schools discounts.

If the school ask for a chaperon then you don't have to pay, but always check with school and take money with just in case you have to pay

It is up to the schools to decide if they are providing admission passes to chaperones or not. Parents should check with their child's teacher to find out the school's policy. If your child's school doesn't provide admission passes, you will need to purchase them at the Admission window day of. The admission cost is $24.95 per person (12+). I would also inquire if the school is covering the cost of your parking. Parking in any of the Zoo's lots is $16 per vehicle.

Yes

There are group prices.. you may have to contact zoo officials and get better group pricing which is few dollar cheaper than usual