| Lesson 2: Measurment and Making a Scale Model | ||||||
| Soda Intro |
Objectives: To be able to accurately measure the soda machine, and scale it down to fit on different sized drawing papers for draft and final copies. Expected Work Product: Useful Practice: Have students draw 3 views of a vcr tape (top, side, front) to see how the measures of parallel sides are the same, and to visualize how an object we see "receding" in 3 dimensions can be blocked out in pieces. This can be a whole lesson, with labeling the measures of the 2 sides on each view, and pre-planning how to arrange all three views so they fit on one page. Then, on the back (or other paper) have them redraw each elevation at .5 scale. (we use metrics in all these activities)....... reminding them that this is a scale drawing, so their labels will still show what the full sized measure would be.
Doing the Soda Machine First draft: You need original measurements for the front rectangle, and the right side rectangle. (I did it with a few kids after school). You may use inches, or centimeters. We actually measured inches, then as a class convert to centimeters. (We're doing everything metric to support thinking for place value understanding, decimals, and percentages, which are all big jumps in 6th grade math here) 1. Students take the full sized measurements and figure out what scale will allow them to fit drawing plans on a regular sized paper. It turns out that 1/10 the size fits okay, which is a nice conversion. 2. They first duplicate the two rectangle "elevation" drawings, with two sides of each labeled. |
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