Higher level Biology. As/A Level and IB higher level. Presentation with timed activities( timings on slides) on DNA structure, Hershey and chase experiment, Meselson and Stahl, Semi conservative replication. Animations and mini quizes. Accompanying worksheet with excellent diagrams to take notes with from the presentation. Definitions game as plenary- one of the pair faces away from the board without looking. Highly differentiated presentation.The other member describes the key word without using the word itself and the partner guesses.