Difference between revisions of "Addition with small number rods"
From wikisori
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=== Age === | === Age === | ||
| − | 3-6 <br> | + | 3-6 <br> |
=== Materials === | === Materials === | ||
| − | #Two sets of Small Number Rods. | + | #Two sets of Small Number Rods. |
| − | #Plain squared paper and pencil. | + | #Plain squared paper and pencil. |
#Addition Sign Cards (optional). | #Addition Sign Cards (optional). | ||
| − | <br> | + | <br> |
=== Preparation === | === Preparation === | ||
| − | <br> | + | <br> |
=== Presentation === | === Presentation === | ||
| Line 19: | Line 19: | ||
'''Presentation 1:<br>''' | '''Presentation 1:<br>''' | ||
| − | *The Directress invites the child to build two stairs with the number rods. | + | *The Directress invites the child to build two stairs with the number rods. |
| − | *The rods on the left act as control of error and the rods on the right are used for addition purpose. So, the Directress takes a rod from the left, counts them, for e.g. a rod 7. | + | *The rods on the left act as control of error and the rods on the right are used for addition purpose. |
| − | *Then she invites the child to choose a rod that is shorter than 7. The Directress directs the child to choose from the right set of rods. The child chooses a rod, for e.g. a 5 rod. | + | *So, the Directress takes a rod from the left, counts them, for e.g. a rod 7. |
| − | *Then the Directress places the 5 rod just below the 7 rod, and then says, "how many more to make 7?" The child then counts out the number rod to make 7 based on the 7 rod which acts as control of error and would probably answer "2". Then the child takes a 2 rod and places it besides the 5 rod below the 7 rod and would find them at equal length. | + | *Then she invites the child to choose a rod that is shorter than 7. |
| − | *Directress then explains, "5 plus 2 makes 7" and then shows the child how to write "5 2=7" on plain square paper. | + | *The Directress directs the child to choose from the right set of rods. |
| + | *The child chooses a rod, for e.g. a 5 rod. | ||
| + | *Then the Directress places the 5 rod just below the 7 rod, and then says, "how many more to make 7?" | ||
| + | *The child then counts out the number rod to make 7 based on the 7 rod which acts as control of error and would probably answer "2". | ||
| + | *Then the child takes a 2 rod and places it besides the 5 rod below the 7 rod and would find them at equal length. | ||
| + | *Directress then explains, "5 plus 2 makes 7" and then shows the child how to write "5 2=7" on plain square paper. | ||
*The Directress can continue the presentation by showing a few more examples. | *The Directress can continue the presentation by showing a few more examples. | ||
| − | <br> | + | <br> |
=== Control Of Error === | === Control Of Error === | ||
| − | The Rods themselves act as a Control of Error because the quantities are fixed. <br> | + | The Rods themselves act as a Control of Error because the quantities are fixed. <br> |
=== Points Of Interest === | === Points Of Interest === | ||
| − | As a preparation to learn Number Bonds, when doing the above exercise, we could always exchange places between the 2 addition rods and reinforce that, for e.g. 5 2=7 and 2 5=7 as well.<br><br>Exercises should not be called 'sums' as in correct mathematical language the 'sum' is the answer to an addition question. We use 'exercise or 'example' instead. <br> | + | As a preparation to learn Number Bonds, when doing the above exercise, we could always exchange places between the 2 addition rods and reinforce that, for e.g. 5 2=7 and 2 5=7 as well.<br><br>Exercises should not be called 'sums' as in correct mathematical language the 'sum' is the answer to an addition question. We use 'exercise or 'example' instead. <br> |
=== Purpose === | === Purpose === | ||
| − | *Introduce the child to addition with numbers 1 to 10. | + | *Introduce the child to addition with numbers 1 to 10. |
| − | *Show the child how to record additions up to 10. | + | *Show the child how to record additions up to 10. |
*Provide controlled exercises for teaching number bonds. | *Provide controlled exercises for teaching number bonds. | ||
| − | <br> | + | <br> |
=== Variation === | === Variation === | ||
| − | <br> | + | <br> |
=== Handouts/Attachment === | === Handouts/Attachment === | ||
| − | <br> | + | <br> |
| − | [[Category:Mathematics]][[Category:Mathematics_3-6]] | + | [[Category:Mathematics]] [[Category:Mathematics_3-6]] |
Latest revision as of 03:47, 15 October 2009
Contents
Age
3-6
Materials
- Two sets of Small Number Rods.
- Plain squared paper and pencil.
- Addition Sign Cards (optional).
Preparation
Presentation
Presentation 1:
- The Directress invites the child to build two stairs with the number rods.
- The rods on the left act as control of error and the rods on the right are used for addition purpose.
- So, the Directress takes a rod from the left, counts them, for e.g. a rod 7.
- Then she invites the child to choose a rod that is shorter than 7.
- The Directress directs the child to choose from the right set of rods.
- The child chooses a rod, for e.g. a 5 rod.
- Then the Directress places the 5 rod just below the 7 rod, and then says, "how many more to make 7?"
- The child then counts out the number rod to make 7 based on the 7 rod which acts as control of error and would probably answer "2".
- Then the child takes a 2 rod and places it besides the 5 rod below the 7 rod and would find them at equal length.
- Directress then explains, "5 plus 2 makes 7" and then shows the child how to write "5 2=7" on plain square paper.
- The Directress can continue the presentation by showing a few more examples.
Control Of Error
The Rods themselves act as a Control of Error because the quantities are fixed.
Points Of Interest
As a preparation to learn Number Bonds, when doing the above exercise, we could always exchange places between the 2 addition rods and reinforce that, for e.g. 5 2=7 and 2 5=7 as well.
Exercises should not be called 'sums' as in correct mathematical language the 'sum' is the answer to an addition question. We use 'exercise or 'example' instead.
Purpose
- Introduce the child to addition with numbers 1 to 10.
- Show the child how to record additions up to 10.
- Provide controlled exercises for teaching number bonds.
Variation
Handouts/Attachment
