Addition With Number Rods
From Montessori Album
| Addition With Number Rods | |
|---|---|
| Math - Memory Work | |
 | |
| Level | Primary |
| Age | 4 - 5 |
| Prerequisites | Number Rods With Numerals |
| Materials | Number Rods numeral cards 1-10 2 "+" signs 2 "=" signs |
This activity introduces the child to simple addition facts.
Presentation
- Bring the material to the mat. Grade the rods.
- Place the 1 rod and the 2 rod end to end. Ask the child to find one rod that is as long as the two put together.
- Place the 3 rod below to compare. "This rod and this rod put together are the same as this rod."
- "Here's another way we can say it:" place the symbols as shown.
- Count the rods and place the appropriate number cards. "One plus two is the same as three."
- Scoot the number cards down and add the second set of symbols. "One plus two equals three."
Points of Interest
Aims
Direct Aim:
- To show how we get larger numbers from smaller ones.
Indirect Aim:
- To show the limits of base 10.
- Inquiry into the concept of one half.
Control of Error
- The ten rod.
- The visual shape of the layout.
Variations and Extensions
Material
Where to Buy
Prices and links checked: 23 January 2022
| Number Rods | |
|---|---|
| Store | Price |
| Adena | $58.95 |
| Affordable Montessori | $70.00 |
| Alison's with number cards |
$49.61 |
| Bruins | $180.00 |
| E & O | $102.60 |
| IFIT | $60.00 |
| Kid Advance | $59.99 |
| Leader Joy | $77.95 |
| Materials Co. of Boston | $125.00 |
| Montessori Concepts | $78.00 |
| Montessori Outlet | $63.95 |
| Nienhuis | $188.80 |
| Thinkamajigs | $72.95 |
| Stand | |
|---|---|
| Store | Price |
| Adena | $32.99 |
| Affordable Montessori | $42.00 |
| Alison's | $32.41 |
| Alison's | $52.50 |
| Bruins | $60.00 |
| IFIT | $30.00 |
| Kid Advance | $32.99 |
| Leader Joy | $33.95 |
| Material Co. of Boston | $49.00 |
| Montessori Concepts | $34.00 |
| Montessori Outlet | $35.95 |
| Pink Montessori | $26.90 |
| Thinkamajigs | $42.95 |
| Number Cards | |
|---|---|
| Store | Price |
| Adena | $12.55 |
| Affordable Montessori | $13.00 |
| Alison's | $10.00 |
| Alison's | $24.00 |
| Alison's | $18.00 |
| Bruins | $27.00 |
| E & O | $19.80 |
| Hello Wood | $33.00 |
| IFIT | $11.00 |
| Kid Advance | $12.99 |
| Leader Joy | $18.95 |
| Materials Co. of Boston | $10.00 |
| Montessori Concepts | $19.00 |
| Montessori Outlet | $5.95 |
| Montessori Outlet | $5.95 |
| Montessori Outlet box |
$5.95 |
| Nienhuis | $13.20 |
| Nienhuis box |
$18.15 |
| Pink Montessori | $12.50 |
| Thinkamajigs | $13.95 |
| Table-top Number Rods (2 sets of little rods) | |
|---|---|
| Store | Price |
| Adena | $30.93 |
| Affordable Montessori | $29.00 |
| Alison's | $80.00 |
| Alison's | $30.87 |
| Bruins | $110.00 |
| E & O | $46.80 |
| IFIT | $28.00 |
| Kid Advance | $34.99 |
| Leader Joy | $34.95 |
| Materials Co. of Boston | $85.00 |
| Montessori Concepts | $38.00 |
| Montessori Outlet | $36.95 |
| Nienhuis | $124.85 |
| Pink Montessori | $24.90 |
| Thinkamajigs | $29.95 |
| Half-size Number Rods (5cm-50cm) | |
|---|---|
| Store | Price |
| Affordable Montessori | $39.00 |
| IFIT | $30.00 |
| Pink Montessori | $19.50 |
