Teacher will do demonstration mixing a clear liquid (vinegar) and a white powder (baking soda) resulting in a bubbling chemical reaction. The students will then be given the packages of materials and be asked to replicate the teacher's experiment, repeating their trial 3 times. Some groups will not be able to do this since their white powder is not baking soda, but cornstarch, which will not react with vinegar. Out of this discrepant event, the guiding questions will evoke the realization that accurate information is necessary to for replication of scientific investigations. Time will be spent differentiating replication from repetition.