Counting objects to 20

MathematicsCounting & CardinalityAges 5–6

Count a set of objects to answer 'how many?' for sets up to 20 (arranged in lines, arrays, circles, or scattered)

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Teaching Table · Reviewed guide

Set out your lesson

“Counting answers “how many?” Touch one object for each number word and stop on the last object. Arrangement can change, but careful counting still finds the same total.”

Bring to the table

At least 20 large blocks or toys
A clear table or floor space

Full guide and materials

At least 20 large blocks or toys
A clear table or floor space

Step 1. Line up 15 blocks. Have your child point and count to 15, then say how many.
Step 2. Scatter the same 15 blocks. Count again, touching each block once.
Step 3. Arrange about 12 toys in a circle and count around until every toy is counted once.
Step 4. Give a number such as 18 and have your child count out that many from a larger pile.
Quick check. Success means your child accurately counts a set up to 20 in at least two arrangements and can count out a requested number from a larger set.

Worked example. 18 scattered toys are still 18 when counted one by one without skips or double-counts.

Optional challenge. Count 20 objects in a 4-by-5 array and explain whether counting by rows helped.

What to notice. Save a parent note with the totals counted, such as “line 15, scattered 15, counted out 18.”

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Teaching approaches

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2 approaches

Selected Default Gakuva

Counting answers “how many?” Touch one object for each number word and stop on the last object. Arrangement can change, but careful counting still finds the same total.

Spend about 10–15 minutes counting the same set in a line, then scattered, then in a circle.

Gakuva

Count each object once in several layouts and count out a requested set.

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Practice this concept

A short Gakuva activity you can use without signing in.

Gakuva activity

Counting objects practice

Count objects to 20 by touching each one once, then choose the total from three options.

Practice answers and completion are not saved. Parent observation remains the lesson record.

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Learning resources

Reviewed external links that reinforce this concept. They do not replace Gakuva’s teaching approach.

Topmarks · Practice link — not the full lesson

Teddy Numbers

Build requested quantities with treats. Use amounts through 20 and have the learner touch each object once while counting.

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Review and open practice

Before you open

Save a screenshot of a set between 11 and 20 plus adult observation that each treat was touched once while counting aloud.

Opening this link does not save learning or assess mastery.

Open practice (new tab)

Source, access and review notes

Build requested quantities with treats. Use amounts through 20 and have the learner touch each object once while counting.

Save a screenshot of a set between 11 and 20 plus adult observation that each treat was touched once while counting aloud.

Free · no login · ads

Unknown — link only

The Math Learning Center · Practice link — not the full lesson

Number Frames

Adult-guided frames for building and counting sets to 20 without skipping or double-counting.

Free · no login