Seizures only at school


I am the mother of a 15 year old daughter who was diagnosed with epilepsy at the age of 7. She started first with petit mal seizures then, at the age of 10, started having gran mal seizures. They did finally control these with keppra and trileptali and she had been seizure free for two yearss. Recently, when school started to be exact, she sstarted having seizures again but only at school. I havent seen her have one in almost 3 years but the school sees her have one every other day. We have been to 5 neurologist and they all say the same thing, its stress and epileptic meds wont control them. I am just wondering if anyone else has had this same experience and if so, how did they diagnose you and what did they do to prevent them?