If the clip is on Table Voice, then only the members of their table should be able to hear their voices. Teacher Voice is their louder speaking voice. This is generally the voice they use when they are reading or sharing with the class.
Holy cow, 271 pages of Post-it activities for teachers. This might be a pin now, read later. This is a cheap, easy way to get students up and moving while still learning and it gets them thinking of different types of questions to ask.