Complex sentence: It has around 517 pupils aged 11--16, a drop in numbers from 715 in March 2006 and is a specialist Sports College (since July, 2010.) Having been a Language College from July 2001 until July 2010.
Split into simpler sentences: It has around 517 pupils aged 11--16, a drop in numbers from 715 in March 2006. It is a specialist Sports College (since July, 2010.) Having been a Language College from July 2001 until July 2010.