The Interior — Mathematics

Counting and how many

The counting words in order, one number for each thing, and the last number tells how many. Counting on from any number, counting by tens to 100, and what to say after 29. Ten-frames, fingers and teen numbers as ten and some more. Two groups compared with more, fewer and the same, by lining them up or by counting. Study cards, hints, a practice quiz at three levels, and four workshop activities that check themselves.

← Math, every band

Start Here

Start here

The last number is the answer

Five things in a row. Touch each one and say a number out loud.

Two things people get wrong

People often think…

A group spread out across the table has more in it.

People often think…

14 is a 1 and a 4.

Touch, count, say the last one

Watch one

Count four blocks.

  1. Touch the first one: 1.
  2. Keep going: 2, 3, 4.
  3. Stop. What was the last number?
  4. 4. There are 4.
One sentence, then you move on

How do you know how many there are without counting again?

Where this goes

Where this lives

Setting the table for the right number of people, checking you got all your things back, counting change.

What this feeds

Next unit is adding and subtracting within 20 — putting two counts together.

Count something in this room and write how many.

Your practice never leaves this device. There is no account and no sign-in. Your work is saved in this browser only, and you can erase it whenever you want.
Your practice record — saved on this device

This is your record of the module on screen — it stays here and goes nowhere. Independent means you got it right on the first tap; supported means you got it after the explain-and-retry, or marked ‘I had it’ on a revealed answer. Both count, and neither is a grade. If your teacher asks, copy the row or show them this screen.

Date
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Topic
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Level
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Independent
0 of 0
Supported
0 of 0
Hints used
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Cards studied
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Lab
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Traps met
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Explained in own words
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Confidence
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The answer key is for a teacher: it prints only from here, for the unit on screen. Print the study packet prints the study pages and a blank quiz — never the answers.