In most cases, the built-in microphone on camcorders is enough to capture regular audio of everyday moments. However, in a situation where the clarity of the audio is essential like when a classroom is being videotaped for student behavior or teacher performance, a much more focused microphone must be used. What is the best mic for classroom videotaping, exactly? Basically, what you need in that kind of situation is a compact microphone that functions well with a camcorder. Condenser microphones are your best bet.