Complex sentence: Before the Coon Building was built, academics and shops were located in separate buildings, and the work completed in the shop often was not related to the work completed in the classroom, since the shop products were initially sold for commercial sale.
Split into simpler sentences: Before the Coon Building was built, academics and shops were located in separate buildings. In addition, the work completed in the shop often was not related to the work completed in the classroom, since the shop products were initially made for commercial sale.