SENIOR MODERATOR SOG Member FT Professional, Author '03 Finalist, PSofATL '02 Finalist, PSofATL '02 1st Place, WCSPA '01 Honors, WCSPA Featured in Artists Mag.
Joined: Jun 2001
Location: Arizona
Posts: 2,481
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I have long used a gridded transparent ruler, but because it lets me see past the plumb line. That would be LITERALLY so.
The grid marks help in evaluating both horizontal and veritcal plumb lines. There is, however, a HUGE downside - because there is a tendency for students to want to use the numerical measurement on the ruler. Unfortunately this causes them to sometimes get sidetracked in minutia.
It's not the number, its the relationship.
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