Students should search the web for a cooking demonstration video. Local news stations Fox 2 and WDIV are good places to start. Assess how effective the person was while working with their visual aids. A few questions to ask are: did they keep talking while working or were their moments of dead air? Was the process explained in simple, easy to follow steps? Did they reveal steps taken before hand (that you didn't see them perform on the video)? Was their voice interesting to listen to and conversational? Did they reveal the final product?