If you look up on the internet, Administration of medication in schools, there is lots of info and usually from your local council re teachers giving medication.It says that although they are not legally obliged, teachers do have a in loco parentis duty of care and especially children with long term medical problems, a care plan should be drawn up between the schools assigned nurse, parents and teachers. Re other short term medicines , most schools have staff who have been appropriately trained and this is important to ensure the child can still attend school.
At my dc school I have been called in to remove a splinter from dd finger ( 20 mins before hometime!) rang urgently to come and help with a child who was having an asthma attack ...and who they were panicking over....but then on the other hand ds1 was given a huge dose of paracetamol 2 hours after the previous one !
I find Herman, that although we tell patients to administer with regular intervals between ....in practice I'm sure most parents don't...especially with penicillin which we might give at midnight in the hospital, but once the parents are home, they're not going to wake up little johnnie in the middle of the night , are they ? and does it make a huge difference if it is an hour off the time prescribed ? I can't say we see children back in with infections and you know what some parents are like.....the medicine probably ferments in the back of the fridge from one day to the next !