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- [ CMP - Stretching and Shrinking ]
Calculators are strongly recommended this week for scaling exercises.
12-12-2005 Math 2a
1. HOMEWORK: Sketch and measure the bedroom to the nearest 1/4 inch. Include door widths and window lxw (labeled). Must be accurate measures - no graph paper sketches.
2. Page 40 1-4 Writing
3. Wrap Up from last week (3.2/3.3)
OBJECTIVE: (Check the Essential Learnings and Grade Level Equivalent numbers here.) •To recognize similar figures and to be able to tell why they are similar [1.3.3][1.3.1] •To understand that any two similar figures are related by a scale factor, which is the ratio of their corresponding sizes •To build a larger, similar shape from copies of a basic shape (a rep-tile) •To find rep-tiles by dividing a large shape into smaller, similar shapes •To understand that the sides and perimeters of similar figures grow by a scale factor and that the areas grow by the square of the scale factor[1.1.4][1.2.5] •To find a missing measurement in a pair of similar figures •To recognize that triangles with equal corresponding angles are similar[1.3.1][1.3.2][5.1.1] ACTIVITIES/ASSESSMENT: WarmUp: Proportion problems. Page 40 1-4 Writing (Reflections) and wrap up from investigation three problems from last week if needed, NOTES: HOMEWORK: None
12-13-2005 Math 2a
1. Pages 93-95 Quiz A
2. start: Scaling exercise from sketch (0.5" = 12")
3. Distribute TIMSS released items
OBJECTIVE: See 12-12 above. ACTIVITIES/ASSESSMENT: Complete Quiz A(handout) and introduce the scaling proportion drill. Students must take notes! The primary task will be to scale their full size dimensions to paper sizes using the 1/2 inch = 12 inch scale. Distribute TIMSS released items. Solutins will require an explanation. Tentatively due on 12-16 NOTES: HOMEWORK: Read pages 41 to 43. Generate a question.
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12-14-2005 Math 2a
1. HOMEWORK: Read pages 41 to 43. Generate a question.
2. Proportion drill
3. Page 44 problem 4.3 (modified)
OBJECTIVE: (Check the Essential Learnings and Grade Level Equivalent numbers here.) •To use the definition of similarity to recognize when figures are similar •To determine the scale factor between similar figures to find the lengths of corresponding sides[1.1.4] •To find a missing measurement in a pair of similar figures[1.1.4] •To use the relationship between scale factor and area to find the area of a figure that is similar to a figure of a known area •To solve problems that involve scaling up and down[1.1.4][1.2.5][1.3.1][1.3.2][5.1.1] ACTIVITIES/ASSESSMENT: Warm-Up: proportion drill; Page 44 problem 4.3 (modified). Primarily an exercise for term usage, i.e., enlarging/reducing by a percent (e.g., enlarge 150%) NOTES: HOMEWORK: TIMSS Released items time (due Friday)
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12-15-2005 Math 2a
1. Page 45 Problem 4.4 Map Scales (modified)
2. Proportion drill
OBJECTIVE: See 12-13 above. ACTIVITIES/ASSESSMENT: WarmUp: Proportion drill; Page 45 Problem 4.4 Map Scales (modified) Lesson will be done using local to national maps (probably projected) NOTES: HOMEWORK: TIMSS Released items time (due Friday)
12-16-2005 Math 2a
1. Project: TIMSS Released items [What is TIMSS?]
2. Pp47ff ACE 1-7. 10-20
OBJECTIVE: See 12-13 above. ACTIVITIES/ASSESSMENT: Collect/correct TIMSS released items; Do Pp47ff ACE 1-7. 10-20 as teams NOTES: HOMEWORK: Page 56 #23
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