One, two, three: counting
Say one number for each object; the last number tells how many there are.
Start with the objects ↓An idea to revisit first: Match one to one →
Think with objects in front of you
Tap each object once while saying one, two, three. The last number tells how many there are altogether.
Put three objects in front of you. Point to one and say ‘one’, the next and say ‘two’, and the last and say ‘three’. Each object receives one number name.
When asked ‘How many altogether?’, you can answer ‘three’. The last number is not just a label for the last object; it also gives the size of the whole collection.
One is written 1, two 2, three 3, four 4, and five 5. Continue with six 6, seven 7, eight 8, nine 9, and ten 10. Point and say each at your own pace.
Counting one object twice or skipping one changes the answer. Move or mark counted objects. Starting at the other end gives the same count if every object is counted exactly once.
Listen one paragraph at a time
Now move the objects yourself
Tap each object to mark it as counted. Say the total before revealing the number.
Tap objects to mark what you have counted. There is no time limit.
First collection
You may use small toys or blocks instead of the screen. Explain what stayed the same and what changed.
Check your idea with different examples
Why does marking counted objects help?
You may speak or draw on paper. Look for these ideas in your explanation.
Continue reading, or pause here
What number describes the collection after every object is removed? Next comes zero.