Teachers in a Delaware high school are taking a natural approach to chemistry -- abandoning Bunsen burners and dangerous substances and using only safe and biodegradable supplies in the classroom. The curriculum was developed by an MIT physicist and focuses on hands-on lessons to engage students in chemistry principles. Thirty-five teachers in Delaware have been trained in the method. "This curriculum has forced me to rethink what I've known and taught for 20 years," one teacher said.
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