Yes, you are very justified in requesting an audit. Your instructor sounds very unprofessional. Your company did not pay money so you could discuss current events. They paid so you could gain valuable skills and tools. Your company did not pay money so you could be embarrassed in front of the whole class. The instructor is the one who should feel embarrassed. She did not conduct herself in a classy manner. She did not fulfill your contract in that you did not receive the skills and knowledge you anticipated.