Complex sentence: Urumi's teacher, Ms. Fujimori, while initially welcoming and receptive, wasn't able to handle her intellect properly, since she went to a second-rate college, and it was her first year teaching.
Split into simpler sentences: Urumi's teacher, Ms. Fujimori, while initially welcoming and receptive, wasn't able to handle her intellect properly. The reason for this was because her teacher went to a second-rate college, and it was her first year teaching.