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The Fence or the Carpet: Understanding Perimeter and Area

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Description

Overview:
Math unit about understanding Perimeter and Area using Khan Academy materials. Appropriate for grades 3-5.
Subject:
Mathematics
Level:
Upper Primary
Grades:
Grade 3
Material Type:
Assessment, Homework/Assignment, Lesson Plan
Author:
Date Added:
01/28/2016
License:
Creative Commons Attribution
Language:
English
Media Format:
Downloadable docs, Text/HTML

Comments

Susan Jones
on Apr 28, 02:16pm Evaluation

Quality of Explanation of the Subject Matter: Strong (2)

The videos clearly explain, with pictures and good math language, the concept of area.
However, drawings comparing different areas are not drawn to the same scale, and student questions beneath indicate students are confused by this. A 40 x 30 land plot appears smaller than the 20 x 50 plot -- because, in fact, it *is.*
However, students are expected to do activities before they have learned skills.

Susan Jones
on Apr 28, 02:16pm Evaluation

Utility of Materials Designed to Support Teaching: Strong (2)

This lesson is comprehensive and easy to understand, but does not include adapations for different levels of learners and, as noted, exercises are out of sequence with videos (they are out of sequence on the KA site).

Susan Jones
on Apr 28, 02:16pm Evaluation

Quality of Instructional and Practice Exercises: Limited (1)

Actually, there's too much variation in the exercise type. There are glaring issues with the practice, such as expecting students to figure out areas of half squares (the area of a triangular shape) when at no point was this addressed in instruction (and there are no scaffolding hints; just the question). Students are asked to practice the "distributive property" skill... before the instructional video on the material.
Adjustments by the teacher could ameliorate this, fortunately.

Susan Jones
on Apr 28, 02:16pm Evaluation

Opportunities for Deeper Learning: Limited (1)

This lesson includes students watching a video that shows a 12 square meter area, and that if measured in "fungles" that the area would only be 3 square meters, adn that a fungle is twice as big as a square meter.
However, there is no opportunity for students to explore this pattern. Likewise, while students can see that perimeter and area are different, there isn't clear guidance about topics such as plots with the same perimeter having different areas.

Susan Jones
on Apr 28, 02:16pm Evaluation

Quality of Technological Interactivity: Strong (2)

The technology works very well, and could be called "individualized" since it keeps track of an individual's progress, but the actual learning experience is essentially the same for everybody, so it's shy of a 3. The points and encouragement along the way are strong, but when it tried to calculate my score, it stalled out completely and kept rotating between "cute" phrases about what it was doing until I turned it off.

Susan Jones
on Apr 28, 02:16pm Evaluation

Quality of Assessments: Superior (3)

The assessment is a strength of this lesson, including drawings and clear questions.

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Average Score (3 Points Possible)
Degree of AlignmentN/A
Quality of Explanation of the Subject Matter2 (1 user)
Utility of Materials Designed to Support Teaching2 (1 user)
Quality of Assessments3 (1 user)
Quality of Technological Interactivity2 (1 user)
Quality of Instructional and Practice Exercises1 (1 user)
Opportunities for Deeper Learning1 (1 user)

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