Comparing Lengths & Heights
Compare two objects directly by length or height and describe the difference using language such as long, short, tall, longer, shorter, taller, double, half
Lesson
Set out your lesson
“We compare height with taller and shorter. We compare length with longer and shorter. Line the objects up at the same baseline before deciding.”
Bring to the table
- Two books or boxes with clearly different heights
- A ribbon, string, or strip of paper longer than both objects
Extra for the adult
Worked example. If one book stands clearly above the other from the same table surface, that book is taller and the other is shorter.
Optional challenge. Add a third object and order all three from shortest to tallest, saying the comparison words as you go.
What to notice. Save a parent note naming the two objects and the comparison words your child used.
Share and support
Compare teaching approaches
Teaching approaches
Gakuva’s recommended starting approach is selected. You can still compare every option.
1 approach
We compare height with taller and shorter. We compare length with longer and shorter. Line the objects up at the same baseline before deciding.
Spend about 10 minutes comparing two household objects by height and by length.
Family records and proof options
Keep a record of your learning
Save photos, notes, and attendance. Export a proof packet for compliance or portfolio reviews.
Learning resources
Extra practice links — they do not replace Gakuva’s teaching approach.
Illustrative Mathematics · Practice link — not the full lesson
How Big is a Foot?
Before you open · source notes
Comparing foot-length units supports comparing lengths and heights. Not every conversion formula.
Free, no sign-in. A teacher solution is on the same page, so use the student view with your child.
Before you openAsk the learner to compare two lengths and say which unit made the measure change.
Opening this link does not save learning or assess mastery.
Source, access and review notes
Public Illustrative Mathematics task page. The .html address responds HTTP 308 to this URL. An anonymous GET of this URL on 2026-11-12 returned HTTP 200 with no login or payment prompt. Where a teacher solution is present, it is on the same page as the student task; this check did not find a separate locked student view. An adult can use the student view section and should not read a solution aloud. Advertising was not observed in the fetched HTML text; that is not a browser, device, or ad-free guarantee. This is a paper or discussion task, not an automatically marked interactive game. Opening the link does not save practice or assess mastery. Diagrams on the page use missing or filename-only alt text, so they are not an accessible image equivalent. Accessibility still depends on an adult describing the picture.
Illustrative Mathematics. “How Big is a Foot?.” Licensed CC BY-NC-SA 4.0. External task; Gakuva does not copy, host, embed, or redistribute it.
CC BY-NC-SA 4.0 — link only
Check understanding
- Stand two children back-to-back and say who is taller/shorter
- Directly compare the heights of two towers and describe one as taller
- Use 'longer' and 'shorter' to compare two ribbons placed side by side
“If your child stands next to the kitchen table and the front door, can they tell you which is taller — and whether they themselves are shorter or taller than each one?”
Curriculum record
- Type
- Procedural
- Subject
- Mathematics
- Domain
- Measurement
- Age range
- Ages 4–7
Standards