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Week 1 · Nature Detectives

Math

Measurement & data collection

Use rulers, scales, and tally charts to record field observations.

Pick your age

5-day pacing

Today's focus: learn the concept.

The Hook

Detective Pip lost his ruler in the garden! Help him measure leaves using paperclips until we find it.

The Big Idea

We measure by counting how many of the SAME thing fit across something else.

Learn

Measuring means counting. If a leaf is as long as 4 paperclips, we say it is 4 paperclips long.

Everything we measure has a NUMBER and a UNIT. The number tells how many. The unit tells WHAT we counted (paperclips, inches, footsteps).

See It

Leaf vs. paperclips

  🍃─────────────🍃
  ▭ ▭ ▭ ▭
  1 2 3 4   ← 4 paperclips long

Key terms

Measure
Find out how big or how long something is.
Unit
What we use to measure (paperclips, inches, cups).

Try It (in the app)

Number AND unit?

Quick check

Pick the answer that has BOTH a number and a unit.

  1. 1. How long is the stick?

  2. 2. Which one is NOT a unit?

Match the tool to the job

Match game
How heavy is the apple?
How long is the rope?
How much water?

Worksheet

Fill in here, or print a blank copy

Paperclip Measuring

Go find 5 things outside. Lay paperclips along each one and count.

  1. 1. A stick is paperclips long.
  2. 2. A leaf is paperclips long.
  3. 3. My shoe is paperclips long.
  4. 4. A rock is paperclips wide.
  5. 5. The LONGEST thing I measured was .

Hands-On Build

Build a paperclip ruler

Materials

  • ·10 paperclips
  • ·Tape
  • ·Strip of cardboard

Steps

  1. 01Tape 10 paperclips in a row on the cardboard.
  2. 02Number them 1–10.
  3. 03Take it on a measuring hunt outside.

Mission Tie-In

The Mystery of the Missing Ducklings needs YOU to measure duck tracks!

Wrap-Up Discussion

  • ?What was the longest thing you measured?
  • ?Why do we need to say the unit?