Ward's World Activity Guides

+ ward ' s science Page 3 Building Your Own Crystal Radio (continued) Activity Embedded Assessments: Activities: Day 0 • Small Poster. Students will have about 25 minutes to research and create a poster about how cell phones and WiFi work in rural versus urban areas. Hopefully, this will allow students to start thinking about the access of cell phones and wifi around the world. About 20 minutes left for class to do a quick gallery walk or 1 minute presentation per team.* Optional lesson. • Optional Ticket-Out-The-Door. Teachers can provide each student one or more sticky notes to write a comment about what they like about their presenting team. You can also use the sticky note as a ticket-out-the-door to have students share 2 things they found interesting about the lesson. Crystal Radio Lab: Day 1 • Assign students the Crystal Radio Lab doc. Students will start researching crystal radio and how they work. They will sketch a design of how they would like to build their crystal radio along with what materials they need. • Depending on the time, the videos in the lab can be assigned as homework or they can be watched together as a class to promote more discussion. • Students will also provide a short presentation to demonstrate their understanding of how information is transmitted through electromagnetic radiation to encode a signal. Students will have the choice of creating either a flier, small poster, or a short Google Slides presentation (5 slides or less) to explain how radio waves are used to transmit information with electro- magnetic radiation to encode a radio signal (basically how does a radio works using radio waves?). • Another option would be for students to create a video showing the progress of their research, building the crystal radio, and demonstrating that their crystal radio works. Ticket-Out-The-Door • Ticket-out-the door will be their sketch of their crystal radio, research, and the materials needed. (If turning in online have only one member of each team turned the assignment in so it is easier to grade 8 versus the whole class.) Day 2: Warm Up • Start with a 5–12 minute warm up about Alan Turing. Before showing students the video ask if any students have heard about Alan Turing before. If students don't know anything then mention that Mr. Turing will be a special guest in the classroom today and ask students to share with a partner why we are highlighting Mr. Turing. Randomly select a few students with a random name generator to share aloud their thoughts. • Play the Youtube video (6 minutes long). (Alan Turing—betrayed by the country he saved) Time is limited here so you can skip the introduction questions and move straight to the video too. As students are watching the video you can take attendance or finish setting up for the class. Possible questions to ask: 1. What was Alan Turing credited for discovery? 2. How did Alan Turing die? What was he convicted of, and what was his sentencing? Do you think this was fair or nor fair? Why or why not? 3. Do you think being recognized on the 50 bank note for England made a difference? Why or why not? Continue to work on Crystal Radio Lab • Return the crystal radio sketch that students turned in yesterday by hand or digitally. If revisions need to be made to their design, have students fixed it. • Students will gather all the materials needed either partly from home or everything from the teacher. Teachers should only provide material to students after the team demonstrates that they have a good grasp of how they plan to build their crystal radio.

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