The Case of the Poisoned Parks is an activity to use with grade 11 chemistry students that adresses several different ideas. It can be used in the solutions unit, or can be used as a summative task. Curriculum expectations covered are: identifying ions in solution, lab techniques of planning, and conducting an experiment, filtration and separation of mixtures, environmental and health implications of various chemical compounds, and exploring and researching career connections.
To begin, I go around and take pictures of local parks in the area that the kids recognize. I make 8 different scenarios (depending on your numbers this could be more or less) and give the kids a “scenario”.