By Popular Demand!

A while back I wrote about turning my classroom into bakery. Here’s the original post: Let Them Eat Bread  Since then, I’ve had a lot of people ask for the document I used for the yeast lab. I apologize that it took me forever to post it, but better late than never. So here it is: YeastLab. I have my students do a formal lab report with this one. Their initial hypotheses are usually all over the place, and someone always says the salt will kill the yeast.

This year I used both the yeast tube lab and the bread baking in our cellular respiration unit. I started the unit by having them write in their journals in response to “Why does bread dough rise?”. It was important to emphasize to them to just write whatever they thought. This gave me a good idea what their pre-conceptions were, but also allowed me to show growth throughout the unit. After baking the bread, they had a one question quiz. “Write one paragraph explaining why bread dough rises.” They had to include the words cellular respiration, yeast, glucose, and carbon dioxide. I graded them not by marking their answers right or wrong, but by asking questions. Then I put them into pairs based on their scores and had them revise together to raise their scores. I feel like they got a lot more out of it this year.

If you try it out, let me know what works and what doesn’t. I really appreciate your feedback!  Happy Baking!!

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