Difference between revisions of "Plane Figures: Parts of a Straight Line"
From wikisori
(New page: === Age === <br> === Materials === <br> === Preparation === <br> === Presentation === <br> === Control Of Error === <br> === Points Of Interest === <br> === Purpose...) |
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Line 1: | Line 1: | ||
=== Age === | === Age === | ||
− | <br> | + | 6-9.<br> |
=== Materials === | === Materials === | ||
− | <br> | + | *Two strings attached to spools |
+ | *Two scissors | ||
+ | *A red felt pen.<br> | ||
=== Preparation === | === Preparation === | ||
− | <br> | + | <br> |
=== Presentation === | === Presentation === | ||
− | <br> | + | #Again the directress prepares the spools in her hands and invites the child to watch as the line appears. |
+ | #What is it? A line...a straight line... a straight line.... | ||
+ | #Invite the child to find a point on this straight line and mark it in red. | ||
+ | #The child then takes the scissors to cut the line at the point... this is a straight line... (cut). | ||
+ | #Taking one spool and the point, the teacher extends the string... this is a ray... this is a ray. | ||
+ | #The directress identifies the other ray in the same manner. | ||
+ | #These two rays are equal. a ray starts from a point and goes on to infinity. | ||
+ | #This red point is the origin. | ||
+ | #Therefore a point divides a straight line into two rays. | ||
+ | #With the other spool the situation is repeated, with child identifying a straight line. | ||
+ | #This time the child is invited to make two red points on the line, and to cut the line at the two points simultaneously. | ||
+ | #Before the cut, the line is identified as a straight line. | ||
+ | #After the cut the directress takes on piece at a time. | ||
+ | #This is a ray. This is another ray. | ||
+ | #This is a line segment. | ||
+ | #The two red points on this line segment are called endpoints, because we can't tell which is the beginning and which is the end. | ||
+ | #Therefore two points divide a line into two rays and a line segment.<br> | ||
=== Control Of Error === | === Control Of Error === | ||
− | <br> | + | <br> |
=== Points Of Interest === | === Points Of Interest === | ||
− | <br> | + | <br> |
=== Purpose === | === Purpose === | ||
− | <br> | + | <br> |
=== Variation === | === Variation === | ||
− | <br> | + | Classified nomenclature - after the child has put the cards with the corresponding labels, have him put them in order: origin, ray, endpoints, line segment.<br> |
=== Links === | === Links === | ||
− | <br> | + | <br> |
=== Handouts/Attachments === | === Handouts/Attachments === | ||
− | <br> | + | <br> |
− | [[Category:Mathematics]] | + | [[Category:Mathematics]] [[Category:Mathematics_6-9]] |
Latest revision as of 04:49, 31 July 2009
Contents
Age
6-9.
Materials
- Two strings attached to spools
- Two scissors
- A red felt pen.
Preparation
Presentation
- Again the directress prepares the spools in her hands and invites the child to watch as the line appears.
- What is it? A line...a straight line... a straight line....
- Invite the child to find a point on this straight line and mark it in red.
- The child then takes the scissors to cut the line at the point... this is a straight line... (cut).
- Taking one spool and the point, the teacher extends the string... this is a ray... this is a ray.
- The directress identifies the other ray in the same manner.
- These two rays are equal. a ray starts from a point and goes on to infinity.
- This red point is the origin.
- Therefore a point divides a straight line into two rays.
- With the other spool the situation is repeated, with child identifying a straight line.
- This time the child is invited to make two red points on the line, and to cut the line at the two points simultaneously.
- Before the cut, the line is identified as a straight line.
- After the cut the directress takes on piece at a time.
- This is a ray. This is another ray.
- This is a line segment.
- The two red points on this line segment are called endpoints, because we can't tell which is the beginning and which is the end.
- Therefore two points divide a line into two rays and a line segment.
Control Of Error
Points Of Interest
Purpose
Variation
Classified nomenclature - after the child has put the cards with the corresponding labels, have him put them in order: origin, ray, endpoints, line segment.
Links
Handouts/Attachments