In this Model-Eliciting Activity (MEA), students are selected to develop procedures for conducting a study on plant fertilizers. They are given data to determine which fertilizer is best for school gardens based on growth rate, size of vegetables, amount of vegetables, taste, and color. They will reassess these fertilizers during the twist incorporating safety ratings. Students may arrange the criteria based on their team's interpretation of most important to least important. Students may have to make trade-offs based on these interpretations.

Model Eliciting Activities, MEAs, are open-ended, interdisciplinary problem-solving activities that are meant to reveal students’ thinking about the concepts embedded in realistic situations. MEAs resemble engineering problems and encourage students to create solutions in the form of mathematical and scientific models. Students work in teams to apply their knowledge of science and mathematics to solve an open-ended problem while considering constraints and tradeoffs. Students integrate their ELA skills into MEAs as they are asked to clearly document their thought processes. MEAs follow a problem-based, student-centered approach to learning, where students are encouraged to grapple with the problem while the teacher acts as a facilitator. To learn more about MEAs visit: https://www.cpalms.org/cpalms/mea.aspx