When my 10 year old son goes to stay with his dad, his dad gets him in an hour late to school, at 10am instead of 9am. My son is adamant its okay to be in at 10am because the teachers don't tell him off. When I try to get us out of the house and to school on time, my son argues that we are not going to be late and its okay to be in at 10am. I've asked his dad to get him in on time, but he doesn't seem to care. I'm not sure what to do to avoid the conflict with my son in the morning, thanks