Sun, Moon, and Stars

Objective

Students will understand patterns in the Sun-Earth-Moon system by applying the Claim-Evidence-Reasoning (CER) framework to observational data about objects in the sky.

• CCSS Connection:
  • Next Generation Science Standards (NGSS) Alignment (US adaptation aligned to Common Core):
    • 1-ESS1-1: Use observations of the Sun, Moon, and stars to describe patterns that can be predicted.
  • ELA CCSS Integration:
    • CCSS.ELA-LITERACY.RI.1.1: Ask and answer questions about key details in a text.
    • CCSS.ELA-LITERACY.W.1.2: Write informative texts.

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Materials

• Large printed or projected chart of Erika’s sky observations (morning, afternoon, night for 4 days)
• Dry erase board or chart paper
• Markers
• Individual student notebooks or science journals
• Claim-Evidence-Reasoning graphic organizer handouts (simple, with labeled boxes for 'Claim,' 'Evidence,' and 'Reasoning')
• Visual aids: pictures/models of the Sun, Moon, stars, clouds

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Time Breakdown

Activity	Time (minutes)
Introduction & Review (Phenomena)	5
Group Observation & Discussion	6
Guided CER Writing	6
Sharing and Closing Reflection	3

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Lesson Procedure

1. Introduction & Review (5 minutes)

• Begin by recalling the guiding question:
  “What are some patterns of the Sun-Earth-Moon system?”
• Briefly review what they have previously learned about when the Sun, Moon, and stars are seen in the sky (e.g., Sun during the day, stars and Moon at night). Show pictures to reinforce.
• Show the scenario with Erika’s observations. Explain Erika noted what she saw for 4 days — morning, afternoon, and night.

Teacher Tip: Use expressive tone and ask students to share any observations they remember about the Sun, Moon, or stars. Activate prior knowledge to engage curiosity.

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2. Group Observation & Discussion (6 minutes)

• Display the chart with Erika’s observations in front of the class.
• Read aloud morning, afternoon, and night listings for each day. Ask the class:
  “What do you notice? Which objects are in the sky every morning? Every night?”
• Lead the students to notice:
  • The Sun appears every morning and afternoon.
  • The Moon and stars appear every night.
  • The clouds appear only some times.
• Write these observations on the board with simple phrases like:
  • “Sun – always daytime”
  • “Moon – always nighttime”
  • “Stars – always nighttime”
  • “Clouds – only sometimes”

Engagement strategy: Use a thumb-up/thumb-down quick poll after each observation to confirm understanding.

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3. Guided CER Writing (6 minutes)

• Explain the Claim-Evidence-Reasoning (CER) framework:
  • Claim: Your answer to the question.
  • Evidence: What you see that helps you answer the question.
  • Reasoning: Why your evidence supports your claim.
• Write the prompt on the board:
  “Which object in the sky does not follow the same pattern every day and night?”
• Guide students through filling out their CER graphic organizer:

CER Component	Example for this lesson
Claim	The clouds do not follow the same pattern.
Evidence	The Sun was seen every morning and afternoon. The Moon and stars were seen every night. Clouds appeared only two days.
Reasoning	Because clouds do not appear every day or every night, they do not follow a pattern like the Sun, Moon, or stars.

• Walk around to support students individually or in pairs.

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4. Sharing and Closing Reflection (3 minutes)

• Invite 3-4 students to share their claims and evidence with the class.
• Reinforce the main concept of patterns in natural phenomena and the importance of using evidence to support ideas.
• End with a quick “thumbs up” to show understanding of today’s pattern discovery.
• Preview next lesson: observing the changing shape of the Moon.

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Assessment

• Formative: Teacher observation during discussion and CER writing; check students’ CER organizers for correct claim and supporting evidence aligning with the observed patterns.
• Informal: Student verbal explanations during sharing.
• Objective: Correctly identify that clouds do not follow a daily pattern, while the Sun, Moon, and stars do.

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Differentiation

• For advanced learners: Challenge them to add an extra sentence in reasoning, explaining how Earth's rotation causes these patterns.
• For students needing support: Use sentence starters on the CER organizer, e.g., “My claim is...”, “I saw that...”, “This shows...”

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Reflection & Extension Ideas for Teachers

• Incorporate a simple classroom experiment where students observe and track the sky over a week to apply CER independently.
• Use a digital sky app during a class tablet time for real-time visualization of celestial objects based on the time of day.
• Connect to social studies by discussing how people long ago used these natural patterns for calendars and timekeeping.

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WOW Factor for Teachers:
This plan seamlessly integrates science inquiry methods with literacy standards, building not just science knowledge but critical thinking and writing skills. Its engaging investigative scenario encourages young learners to think like real scientists — making claims, using evidence, and explaining their reasoning — all within an age-appropriate 20-minute session.