Chalk talk, which refers to a lecture or a speech that is given using a blackboard or a whiteboard, has antonyms that are quite varied. One antonym is a hands-free talk, which is a type of presentation that is given without the use of any visual aids or props. Another antonym for chalk talk is a conversation, which implies an exchange of ideas between two or more individuals. A discussion or debate may also be considered an antonym for the rigid and one-way flow of information that is associated with a chalk talk. In summary, the antonyms for chalk talk are interactive, two-way forms of communication that are more engaging and collaborative than a straight-up lecture.