My latest lesson, Test the Next Vaccine, gives early elementary students the experience of what laboratory scientists test each day in their workplace. At their lab stations, they measure different liquids and use the tools of the scientist to create simple reactions as they combine water, food coloring, oil, salt water and peroxide. In the lesson (on TPT), they answer questions about what they are observing at each step, until the final step, where they are asked to reach a conclusion about the