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Developing Number Sense

Developing Number Sense. Cleveland Elementary March 19, 2013. cardinality. Counting On. Each child receives 10-12 counters that the children line up on their desk. Tell them to count 4 counters and push them under their left hand (or place them in a cup.)

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Developing Number Sense

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  1. Developing Number Sense Cleveland Elementary March 19, 2013

  2. cardinality

  3. Counting On • Each child receives 10-12 counters that the children line up on their desk. • Tell them to count 4 counters and push them under their left hand (or place them in a cup.) • Point to their hand and ask how many are there. (Four) • Then count like this: f-o-u-r (pointing to their hand), five, six, etc. • Repeat with other numbers under their hand.

  4. Counting On Game • This game is for two children and a deck of cards with numbers 1 to 7, a RNG (die), a paper cup, and some counters. • The first player turns over the top card and places that many counters in the cup. Place the card next to the cup. • The second child rolls the die and places that many counters next to the cup. • Together they decide how many counters there are in all. • Assessment: Watch to see how they count

  5. More Activities to Develop Number Sense • Once the concept of cardinality is acquired, little is gained from the counting activities described so far. • Now they need to develop number relationships.

  6. Developing Number Relationships

  7. Activitiesto Develop Number Relationships • Subitizing – children tell how many there are without counting • One and two more, one and two less – this involves more than counting back and forth. Children should know that 7 is one more than 6. • Anchors or benchmarks of 5 and 10 • Part-part-whole relationships

  8. More or Less • Use Blackline Master to make a deck of More-or-Less cards. • Make 2 sets of cards with the numbers 3-10. • Groups of two or more • Cup and 12 counters

  9. One or Two, More or Less • First child draws a number card and places it face up so all can see. That number of counters is put in the cup. • Next child draws a More-or-Less card and places it next to the number card. • Counters are added or removed from the cup, unless the zero card is drawn. • Each child predicts the number of counters that are in the cup. • Counters are dumped out and counted, ending that round of the game.

  10. Relationships of More, Less, and Same • It is easy for children to choose the set that has more. • Although it is related, “less” is more difficult • A More or Less Fish Story

  11. Anchoring Numbers to 5 and 10 • The Five Frame • Only one counter is allowed in each section. • No other counter is allowed on the five frame mat. • Show 3 on the five frame. • What can you tell us about 3 from your five frame?

  12. Anchoring Numbers to 5 and 10 • The Ten Frame • Always fill the top row first, starting on the left, the same as you read. • When the top row is full, counters are placed on the bottom row, also from left to right. • At the beginning, children will count every counter on the ten frame. Some will take every counter off before showing another number. Others will notice a pattern and take off only what is required. • DO NOT PRESSURE THE STUDENTS. • How children use the ten frame provides you with insight into student’s current number concept development.

  13. Anchoring Numbers to 5 and 10 • Put eight counters on the ten-frame. • What are the different relationships for the number 8? • What is the role of 5 and 10 in the problem 8 + 6?

  14. Anchoring Numbers to 5 and 10 • What is the role of 5 and 10 in the problem 13 – 8?

  15. Ten Frame Flashes • Get Ready!

  16. Ten Frame Flash How many?

  17. Ten Frame Flash How many?

  18. Ten Frame Flash How many? Ready for the next one?

  19. Ten Frame Flash How many?

  20. Ten Frame Flash How many?

  21. Ten Frame Flash How many dots? How many spaces? Ready for the next one?

  22. Ten Frame Flash How many?

  23. Ten Frame Flash How many?

  24. Ten Frame Flash How many dots? How many spaces? Ready for the next one?

  25. Ten Frame Flash How many?

  26. Ten Frame Flash How many?

  27. Ten Frame Flash How many dots? How many spaces?

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