Complex sentence: The school (a National Teaching School with Healthy School and International School status), leads the North Somerset Teaching Alliance and which has had academy status since March 2011, also holds the Artsmark Gold award and includes a sixth form.
Split into simpler sentences: The school (a National Teaching School with Healthy School and International School status), leads the North Somerset Teaching Alliance, has had academy status since March 2011. It also holds the Artsmark Gold award and includes a sixth form.