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🧮 Counting Objects to 20

Count collections of up to 20 things — in lines, circles, or scattered piles — and show numbers with counters, fingers, tally marks, and dots.

lessons

~20 min

to learn

🔢 Math

subject

Ages 6–12

level

Start the course →

What you’ll learn

Counting Up to 20Count sets of objects up to 20 and understand teen numbers as ten and some more.Counting to 20 is just adding one more each time. The teen numbers are a full ten plus extras — 14 is ten and four more. Counting carefully, the last number tells how many.
Lines, Circles, and PilesCount objects arranged in lines, circles, and scattered piles without losing track.Count a line from one end to the other, a circle by marking your start, and a pile by moving each object aside. The arrangement never changes the total — ten is ten in any shape.
Showing NumbersRepresent numbers using tally marks, dots, and counters.A number can be shown with objects and pictures: one tally mark or one dot for each count. To show 7, draw 7 dots. These representations connect the spoken number to a picture of the quantity.

Questions this course answers

To count a scattered pile without losing track, you should:

Moving each aside keeps them counted once.

You count 10 blocks in a line, then make a circle with them. How many now?

The shape doesn't change the count — still 10.

Grounded in trusted sources

Khan Academy Kids
PBS Kids — early math
NAEYC — early math learning
Britannica Kids

Every Wunder lesson is built from real, reputable sources — never invented.

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☝️Counting One by One 🔟Counting to Find How Many 💯Counting to 100 🔟Counting to 1,000 📅Days, Weeks, Months, and Years 🔢Decimal Place Value 🧭Degrees and Turns 🧭Describing Movements on a Grid

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