LESSON PLANS LESSON PLANS Math magazine I Small Group (cont.) WEEK 2 I DAY 2
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DRAWING ANGLES WITH A PROTRACTOR Moon Math CONTENT STANDARD Geometry: Draw geometric shapes with given conditions. MATHEMATICAL PRACTICE STANDARDS 5. Use appropriate tools strategically. 6. Attend to precision. OBJECTIVE Students will use a protractor to draw the angles used to represent the Apollo 11 moon lander’s flight plan for land- ing on the moon. LESSON 1 WARM-UP: Hand out blank paper, rulers, and protractors to the class, and write these instructions on the board: 1) Draw a picture of Earth in the middle of your paper and draw a point on its center. 2) Draw and label a planet somewhere else on the paper with a point on its center. 3) Draw another planet at a different location with a point on its center. 4) Use your ruler to draw a ray from Earth to each planet. Ask: What object did you draw? ( an angle ) Which planet contains the vertex? ( Earth ) Using your protractor, what’s the measure of your angle? Explain that space exploration requires precise angle measurements to be successful, as they will read in the magazine. 2 LITERACY: After reading the story, have students write a character profile for Katherine Johnson. Make sure they record as many details about Johnson as they can find in the story, including the obstacles she had to overcome as an African-American living in that era. Watch the video “Breaking Barriers: NASA’s Science Superstar” video to learn more about Christine Darden, another African-American engineer at NASA’s Langley Research Center. 3 GUIDED PRACTICE: Before starting the example, it may help to have the class take a closer look at their protractors. Ask them to point to the origin, baseline ( also called a zero edge ), inner scale, and outer scale on their protractors. Ask: How do you know when to use the inner scale and when to use the outer scale? Make sure students understand that the inner scale is used when the angle opens to the
right. The outer scale is used when the angle opens to the left. Have students follow the steps in the example to draw and name a 52º angle on their papers. 4 INDEPENDENT ACTIVITY: Anticipate student error by pointing out that each angle they draw will be added on to the previous angle. Each new angle will be adjacent to the previous one and will therefore share a ray. For question 4, students will find the measure of an angle that’s formed by their previous drawings. Highlight the importance of correctly naming the angles so they don’t get mistaken for the others. 5 ASSESSMENT: Assess students’ drawings and labels by having them hold up their completed diagrams. If students continue to make errors, continue the lesson by having them draw additional planets at specific angles to Earth on their papers from the Warm-Up. Ask them to name each angle. Then pass out the Exit Slips for additional problems to assess comprehension.
Angle Relationships Angles in Orbit
2 SKILLS SHEETS:
A On Level B Advanced
2 EXIT SLIPS:
CROSS-CURRICULAR CONNECTION Have students research other women human computers throughout history. Human computers were people hired to perform long and often complex calculations before elec- tronic computers were even invented. Other notable human computers include Henrietta Swan Leavitt and Florence Cushman who helped classify stars at Harvard University in the late 1800s, and Kay McNulty and Frances Spence who worked on the Manhattan Project during WWII.
54 Scholar Zone Summer: Math
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