Conditioned reinforcement takes place when a set of behaviour is reinforced or strengthened through a primary reinforcer. A conditioned reinforcer is one where the primary reinforcer and the stimuli has a learned association. For instance, when a teacher uses chocolates to reinforce students for their progress. The students collect these chocolates and students who show greater progress are finally rewarded with a cake. This includes chocolates as a primary reinforcer. Therefore, a teacher who hands out tokens with a primary reinforcer is an example of a conditioned reinforcer.