a blackboard with chalks & dusters ... haven't seen one of these in some time !! ... Surprised this lecture doesn't make use of whiteboards / powerpoint####[['blackboard', 'Teaching_Setup', 'NEU'], ['chalks', 'Teaching_Setup', 'NEU'], ['dusters', 'Teaching_Setup', 'NEU'], ['lecture', 'Course_General_Feedback', 'POS'], ['whiteboards', 'Teaching_Setup', 'NEU'], ['powerpoint', 'Teaching_Setup', 'NEU']]