RockLicker · Grade 3 · Lesson 5 of 5

My First Evidence Report

Write a claim supported by observations and acknowledge what the observations cannot show.

  • Grade 3
  • 40 minutes
  • Worksheet + teacher guidance
Back to Grade 3

What you will learn

A scientific claim is a proposed explanation. Evidence describes the observations behind it; reasoning links the evidence to the idea without overstating certainty.

Words to use

  • claim: an explanation to evaluate
  • evidence: recorded observations
  • reasoning: why the clues support an idea

Evidence for this lesson

Teaching-tray records: A—gray, rounded edges, original locality unknown. B—tan, rounded edges, original locality unknown. C—gray, angular edges, original locality unknown.

Use the supplied record as written; do not invent missing results.

Work through the activity

  1. 5 min · Read the recordRead the three sample descriptions below. Mark statements that describe appearance and those that describe where the samples were observed.
  2. 10 min · CompareCompare edge shapes in the three samples. List similarities and differences before giving a cause.
  3. 15 min · Write carefullyUse “Movement may have worn A and B because …”. Explain that rounded edges are consistent with wear but do not identify the transport agent or original location.
  4. 10 min · Peer reviewA partner identifies your claim, evidence and uncertainty. Revise a sentence that sounds more certain than the record permits.
RockLicker
GRADE 3 · LESSON 5

My First Evidence Report

Draw on the printed sheet or write, type or dictate your response.
Draw on the printed sheet or write, type or dictate your response.
Draw on the printed sheet or write, type or dictate your response.
Draw on the printed sheet or write, type or dictate your response.

Responses stay in this open page only. Print before closing or changing pages; no student record is stored online.

Check your understanding

Which is the more careful claim?

Teacher & family guide · answers and assessment

Grade 3 · My First Evidence Report

Learning goal: Write a claim supported by observations and acknowledge what the observations cannot show.

Expected responses

  1. A and B have rounded edges; C has angular edges. Other stated observations are acceptable.
  2. A cautious wear/transport explanation is reasonable, with “may” or a similar qualifier.
  3. Edge comparison supports possible different wear histories, not certainty about their origins.
  4. Original locality, surrounding sediments, more samples or a documented history could help.

Understanding check: Movement may have worn these edges. The record supports a possibility, not a unique source or transport agent.

Watch for this misconception

Two similar shapes do not prove the same source or transport process.

Assess the evidence

Look for the observations, calculation or explanation named in the learning goal. Accept accurate drawings and dictated responses. Use the expected responses to discuss reasoning; a correct guess without explanation is a starting point for another conversation.

Adapt and extend

Read prompts aloud, enlarge print or let a partner record the learner’s explanation. Turn the report into a Specimen Story and add the actual teaching context.