STEM - Engineering Design
Designing Earth- Friendly Solutions To The Plastics Problem
by Kathryn Davis A
ccording to the United Nations, each year enough plastic is thrown away to circle the earth four times, and these plastics can take over 1000 years to degrade! Sobering facts such as these and images illustrating
the devastating effect of plastic waste on wildlife can leave many feeling paralyzed and hopeless.
While there Prepping for the polymers experiment
are startling examples of the negative impact humans have had on the earth, there are also stories of innovation and incredible problem solving. I shared with my students the story of the engineer in India who created edible utensils, replacing plastic forks and knives with cutlery that is both delicious and eco-friendly, and the graduate student designing biodegradable
clamshell containers from actual clamshells. I want my students to be inspired by these stories, and to feel hopeful that through human innovation and design, we can begin to tackle problems and make changes that can alter our current environmental trajectory.
This is why I’m so excited about the Engineering Design Performance Standards from the NGSS. These standards are the perfect way for students to learn how to design solutions to real problems we face as a society. Often in science classes we bring awareness to issues such as climate change and pollution, but we may fail to arm students with the tools they’ll need to design solutions to these problems. Engineering provides these tools and is also a way to engage even the most reluctant students. This year, I’m working with a group of high school students who have
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been unsuccessful in science in the past, and I was looking for a new way to help them connect with their learning.
Why Are We Learning This?
When I was introduced to Science and Innovation — The Boeing Company and Teaching Channel collaboration — through my work with the Tch NextGen Science Squad, I couldn’t wait to test drive the engineering-focused units with my own students. The ten units are geared toward middle school, the “sweet spot” for curriculum development. This curriculum can be easily adapted to fit both elementary and high school needs as well, by making modifications that will serve your students where they are academically.
I chose the Polymers for the Planet unit because it had a direct connection to what my students were already learning about photosynthesis, yet provided a real world application. In this unit, students use biopolymers (starches) to develop and test a bioplastic. Yes, we’ve all learned that plants make food, but what else can we do with those glucose molecules? What useful products can be developed from the starches created by plants? And how can this help solve a major environmental problem? This unit allows me to answer that ever-present question in the
classroom: Why are we learning this? How does this apply to my life?
I reached out to Jessica Levine, one of the authors of the curriculum and the teacher highlighted in the unit’s accompanying Polymers video, for tips and suggestions. She brought to my attention a great number of resources highlighting the environmental impact of plastics that allowed me to provide my students with some much-needed perspective on the state of our environment. It was so helpful to be able to reach out to her via Teaching Channel, and later to chat on the phone, exchanging ideas for how to best teach this unit.
Considerations For My Students
With any curriculum, teachers will always consider the unique needs of their students. Here are a few things I had to consider about my high school sophomores:
• The majority of my class is considered “at-risk,” in addition to being comprised of a high percentage of special education students and English language learners
• Collecting and analyzing data is challenging and they lack experience
• Using mathematical operations to analyze data will be difficult
• My students have reading skills that are at or below the eighth grade level
Conclusion: My students need a lot of scaffolding! In order to scaffold, I provided tools to help my students
“read to learn,” including an anticipation guide and Frayer model to guide them as they read about bioplastics. These strategies helped my students focus on what they already knew about the topic before reading, and then directed their attention to specific details while reading for background information. Instead of the
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