Guessing games have always been my favorite. I love making predictions and finding solutions to things. The HYG activity was a great way to teach the scientific method in which students make educated guesses or create hypothesis based on what they think will happen when combining different amounts of baking soda, calcium chloride and phenol red. When we tried this activity out as a class, we were all engaged and eager to see if our predictions were true. We tested different amounts of each ingredient and did several experiments, each time with different hypothesis. It's simple and effective so I will definitely be trying it out with my students one day.
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