Complex sentence: At the beginning of the 2009/2010 academic year, the school canteen went under another transformation-with the familiar kitchens being replaced with a self-service bar, and having a dance floor installed, similar to that of the school hall.
Split into simpler sentences: At the beginning of the 2009/2010 academic year, further improvements were made to the school canteen. The kitchens were replaced with a self-service bar, and a dance floor was installed, similar to that in the school hall.