Subtraction With Strip Board: Difference between revisions
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| Topic = Math | | Topic = Math | ||
| Subtopic = Memory Work | | Subtopic = Memory Work | ||
| | | image = [[File:Sub Strip Board 11.JPG|320px]] | ||
| Level = [[Primary]] | | Level = [[Primary]] | ||
| Age = 5+ | | Age = 5+ | ||
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| Materials = | | Materials = | ||
}} | }} | ||
This activity | This activity gives the child practice figuring out and memorizing subtraction facts. | ||
== Presentations == | == Presentations == | ||
=== Presentation One === | === Presentation One === | ||
# Take the material to a mat or table. Lay out as shown. | |||
#:[[File:Sub Strip Board 1.JPG|240px]] | |||
# The first page should have just one problem: 18-9= | |||
#:Take the 9 strip and cover up the numbers starting from the end. The last visible number is the answer. | |||
#:[[File:Sub Strip Board 2.JPG|240px]] [[File:Sub Strip Board 3.JPG|240px]] | |||
# The next page should have two problems: 17-9= and 17-8= | |||
#:Lay the shortest of the plain wooden strips over the number 18 on the board. | |||
#:[[File:Sub Strip Board 4.JPG|240px]] | |||
# Take the 9 strip and cover up the numbers starting from the end. The last visible number is the answer. | |||
#:[[File:Sub Strip Board 5.JPG|240px]] [[File:Sub Strip Board 6.JPG|240px]] | |||
# Then take the 8 strip and cover up the numbers starting from the end. The last visible number is the answer. | |||
#:[[File:Sub Strip Board 7.JPG|240px]] | |||
# next step | |||
#:[[File:Sub Strip Board 8.JPG|240px]] | |||
#:record the equation and answer | |||
=== Presentation Two === | |||
# step one | # step one | ||
# step | #:[[File:Sub Strip Board 9.JPG|240px]] | ||
# next step | |||
# step | #:[[File:Sub Strip Board 10.JPG|240px]] | ||
# step | # next step | ||
#:[[File:Sub Strip Board 11.JPG|240px]] | |||
# next step | |||
#:[[File:Sub Strip Board 12.JPG|240px]] | |||
# next step | |||
#:[[File:Sub Strip Board 13.JPG|240px]] | |||
== Points of Interest == | == Points of Interest == | ||
Line 24: | Line 46: | ||
== Material == | == Material == | ||
This material is kind of a mess. Why can't the frame come right to the edges of the chart? Almost every kid who tries this the first time slides those strips of wood up against the frame and gets the answers all off by one.<br> | |||
And surely we can come up with a different system than using all those ridiculous wooden strips to cover up the numbers at the top. This is needlessly complicated. | |||
===Make Your Own=== | |||
{| | |||
|width="150"|[[Image:Strip Board pdf icon.jpg|link=Media:Strip Board.pdf|140 px|center]] | |||
|width="150"|[[Image:Strip Board strip outlines pdf icon.jpg|link=Media:Strip Board strip outlines.pdf|140 px|center]] | |||
|width="150"|[[Image:Subtraction Fact Slips pdf icon.jpg|link=Media:Subtraction Fact Slips.pdf|140 px|center]] | |||
|- | |||
|valign="top" align="center"|[[Media:Strip Board.pdf | Printable Strip Board - in color]] | |||
|valign="top" align="center"|[[Media:Strip Board strip outlines.pdf | Printable Number Strips - outlines]] | |||
|valign="top" align="center"|[[Media:Subtraction Fact Slips.pdf | Printable Subtraction Fact Slips]] | |||
|} | |||
===Where to Buy=== | |||
[[Category:Where to Buy]] | |||
Prices and links checked: 23 January 2022 | |||
<div class="buyGrid"> | |||
<div class="buyElement"> | |||
{| class="buytable sortable" | |||
|- | |||
!colspan="2"|Traditional (would not recommend) | |||
|- | |||
! Store !! Price | |||
|- | |||
|[https://montessoriresources.com/subtraction-strip-board-0092a0.html Albanesi] | |||
|$118.00 | |||
|- | |||
|[https://www.thinkamajigs.com/subtraction-strip-board/ Thinkamajigs] | |||
|$34.95 | |||
|} | |||
</div> | |||
<div class="buyElement"> | |||
{| class="buytable sortable" | |||
|- | |||
!colspan="2"|Better Versions | |||
|- | |||
! Store !! Price | |||
|- | |||
|[https://www.alisonsmontessori.com/Subtraction_Strips_p/m526.htm Alison's] | |||
|$50.00 | |||
|- | |||
|[https://shop.hellowood.com/Subtraction-Strip-Board-M75.htm Hello Wood] | |||
|$67.00 | |||
|} | |||
</div> | |||
</div> | |||
==Further Reading== | |||
*[[Teaching Montessori in the Home: The School Years]] by Elizabeth G. Hainstock, pages 24, 66 | |||
{{#seo: | |||
|keywords=Montessori Album,lesson,activity,math,memory work,Subtraction With Strip Board | |||
|description=This activity gives the child practice figuring out and memorizing subtraction facts. | |||
|published_time={{REVISIONYEAR}}-{{REVISIONMONTH}}-{{REVISIONDAY2}} | |||
}} |
Latest revision as of 15:02, 23 January 2022
Subtraction With Strip Board | |
---|---|
Math - Memory Work | |
Level | Primary |
Age | 5+ |
This activity gives the child practice figuring out and memorizing subtraction facts.
Presentations
Presentation One
- Take the material to a mat or table. Lay out as shown.
- The first page should have just one problem: 18-9=
- The next page should have two problems: 17-9= and 17-8=
- Take the 9 strip and cover up the numbers starting from the end. The last visible number is the answer.
- Then take the 8 strip and cover up the numbers starting from the end. The last visible number is the answer.
- next step
Presentation Two
Points of Interest
Control of Error
Variations and Extensions
Material
This material is kind of a mess. Why can't the frame come right to the edges of the chart? Almost every kid who tries this the first time slides those strips of wood up against the frame and gets the answers all off by one.
And surely we can come up with a different system than using all those ridiculous wooden strips to cover up the numbers at the top. This is needlessly complicated.
Make Your Own
Printable Strip Board - in color | Printable Number Strips - outlines | Printable Subtraction Fact Slips |
Where to Buy
Prices and links checked: 23 January 2022
Traditional (would not recommend) | |
---|---|
Store | Price |
Albanesi | $118.00 |
Thinkamajigs | $34.95 |
Better Versions | |
---|---|
Store | Price |
Alison's | $50.00 |
Hello Wood | $67.00 |
Further Reading
- Teaching Montessori in the Home: The School Years by Elizabeth G. Hainstock, pages 24, 66