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David Drayer has helped students times in
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On a 33 day streak. Longest streak: 57 days
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David Drayer

42 years teaching experience junior high and high school; credentials in Chemistry, physics, biology, earth science, math thru calculus, Social studies, and English Literature. BS chemistry MED biology MA world history Great interest in America History. Spent three years as a Peace Corp volunteer in Swaziland South Africa.


517K karma · Pittsburgh PA
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Level 20 in Chemistry Level 18 in U.S. History Level 17 in Biology Level 17 in Earth Science Level 17 in Algebra Level 16 in World History Level 14 in Prealgebra Level 12 in Environmental Science Level 12 in Astronomy Level 10 in Organic Chemistry I Level 10 in Anatomy & Physiology Level 10 in English Grammar Level 8 in Geometry Level 7 in Astrophysics Level 7 in Physics Level 4 in Trigonometry Level 3 in Statistics Level 1 in Precalculus Level 1 in Psychology
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Activity 3439 Answers 467 Edits 29 Asked
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