Teachers and families across the country are facing a new reality of providing opportunities for students to do science through distance and home learning. The Daily Do is one of the ways NSTA is supporting teachers and families with this endeavor. Each weekday, NSTA will share a sensemaking task teachers and families can use to engage their students in authentic, relevant science learning. We encourage families to make time for family science learning (science is a social process!) and are dedicated to helping students and their families find balance between learning science and the day-to-day responsibilities they have to stay healthy and safe.
Interested in learning about other ways NSTA is supporting teachers and families? Visit the NSTA homepage.
Sensemaking is actively trying to figure out how the world works (science) or how to design solutions to problems (engineering). Students do science and engineering through the science and engineering practices. Engaging in these practices necessitates students be part of a learning community to be able to share ideas, evaluate competing ideas, give and receive critique, and reach consensus. Whether this community of learners is made up of classmates or family members, students and adults build and refine science and engineering knowledge together.
In today's Daily Do, Why do some people get sunburned?, students engage in science and engineering practices and use both patterns and cause-and-effect relationships as a lens to make sense of the phenomenon of getting a sunburn. Students have an opportunity to apply physical science concepts of electromagnetic radiation to develop life science ideas of variation in traits. This task has been modified from its design to be used by high school students, families, and teachers in distance learning. While students could complete this task independently, we encourage students to work virtually with peers or in the home with family members.
Before you begin the task, you may want to access the accompanying Why do some people get sunburned? Google Slide presentation.
Show slide 2 and have students respond to the question:
Let students share their experiences, some may have gotten a little red, developed blisters, or some may not have ever gotten a sunburn. After students share out, ask a follow up question:
The goal of this question is for students to start to think about skin color and environmental factors that can influence skin color. Be mindful with this discussion to just focus on the patterns students are noticing. Students may have the misconception that people with darker complexions cannot get sunburned or develop skin cancer. People with darker complexions can get sunburned and could develop skin cancer, but they need greater exposure to sunlight versus those with lighter complexions.
Show slide 3 and explain to students that they are looking at two different maps. The map on the left shows UV radiation from the sun. The map on the right shows human skin color distribution. Tell students to compare the information on the two maps. Use the following prompts:
Students may give the following responses:
Show slide 4 and have students link out to the article, Ultraviolet (UV) Radiation: What is UV radiation?, by the American Cancer Society. Instruct students to use the Connect, Extend, Question reading protocol as the read the article.
In the Connect, Extend, Question reading protocol, students use these ideas to:
Engage students in a discussion and ask them what reflections they have on the article after reading and using the Connect, Extend, Question protocol. Accept all student answers. Students may have questions about the role of Vitamin D and why it was mentioned in the article. This idea will be developed later in the lesson.
Tell students that you've found a video that might help us gather more data to determine what structure in our skin is controlling skin color and to see if our claims are correct. Show slide 5 and play The Biology of Skin Color video from 1:38-9:08. Ask students what they've figured out from the video. Students should identify that:
Show slide 6 and ask students, "What role does evolution play?" The goal of this discussion is to problematize what we have just figured out and begin to shift our thinking into: Why is it an advantage, or disadvantage, to have different types of melanin in different parts of the world?
Students may struggle to relate evolution to skin color or make the connection as to why skin color matters. Say to students, "Let's watch some more of the video to see if it can help us make the connection." Show slide 7 and play the video from 9:09-13:43.
After playing the video segment, give students the opportunity to brainstorm what data they might need to determine, "why aren't we all dark skinned?". If students are struggling, remind them about what they figured out in the Ultraviolet (UV) Radiation: What is UV radiation? reading. You may want to use the prompt:
Students need to identify that Vitamin D production may be a key to understanding what advantage the different types of melanin may give people living in different parts of the world.
Show slide 8 and give students a few minutes to do some internet research on what role Vitamin D plays in the body. Ask students to share out what they found. Students should identify:
Ask students to think about and then discuss the prompt:
Students may respond by saying that our bones might not be as strong or other related issues with our bones.
Say to students, "But, I was wondering, like in some areas of the world where we'd expect to see people with lighter skin color, like Alaska, native peoples have darker skin. How would they be able to have healthy bones if their darker skin couldn't make enough Vitamin D?"
Allow students to discuss their ideas. They should identify that we don't just get Vitamin D from exposure to sunlight, but also from our diet. Guide students to infer that while they couldn't synthesize enough Vitamin D from sunlight, they had a diet rich in food containing Vitamin D.
Show slide 9 and give students a few minutes to reflect on what they've figured out before answering the prompt:
Students should identify that:
Show slide 10 and play the video from 16:10-18:57. Ask students to answer the question:
Student answers should reflect the understanding they have figured out from the lesson.
NSTA has created a Why do some people get sunburned? collection of resources to support teachers and families using this task. If you're an NSTA member, you can add this collection to your library by clicking ADD TO MY LIBRARY located near the top of the page (at right in the blue box).
The NSTA Daily Do is an open educational resource (OER) and can be used by educators and families providing students distance and home science learning. Access the entire collection of NSTA Daily Dos.