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Joshua S.

An Astrophysicist Who Teaches Just About Anything

Boston, MA (02108)

Travel radius
20 miles
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$100.00
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Find the greatest common factor of 20, 46, and 48. Then find the greatest common factor of m, m^2, and m^6. Multiply the two answers together.   Note that this works because the greatest common factor of AB, CD, and EF is the greatest common factor of A, C, and E multiplied...

I imagine you are referencing the common ratio between similar quadrilaterals as you might find on worksheets such as this: www.humbleisd.net/cms/lib2/TX01001414/Centricity/Domain/4888/More%20Similar%20Polygons%20Notes.doc The idea is much like that found for any instance of similarity...

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There is very little emphasis these days on teaching programming, in spite of the fact that technology is becoming more and more a dominant aspect of our lives. Perhaps this is because many programmers are self-taught, used to working alone on projects, and therefore the assumption is that students will learn programming "as they go" or "on their own". This is unfortunate... read more

Rigor is something that is emphasized frequently in higher levels of mathematics and physics, and it has always been something that I appreciated. Unfortunately, with increased rigor often comes a decreased number of people who can understand an argument. One pedagogical ploy that has been used to great effect has been to offer "proofs" of rather difficult concepts on the basis... read more

Unquestionably, one of the most entertaining ways to learn astronomy is simply to look up. While the summer nights are short and dusk does not happen until quite late, the relaxed pace of the summer and the locations where summer nights are generally clearer can make for some spectacular views. In the Northern Hemisphere, unfortunately, the winter sky is a bit more spectacular, but there are... read more

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