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David Drayer has helped students times in
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On a 40 day streak. Longest streak: 57 days
467 thank you notes
  • Someone from San Francisco, United States
    Someone from San Francisco, United States yes thank you i was trying to find something for my project in class for this answer
    3 hours ago
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    Someone from Durham, United States thanks i really needs this for a essay
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  • Someone from Durham, United States
    Someone from Durham, United States thank u
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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.


394K karma · Pittsburgh PA
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Level 19 in Chemistry Level 17 in U.S. History Level 16 in Biology Level 16 in Earth Science Level 16 in Algebra Level 15 in World History Level 13 in Prealgebra Level 11 in Astronomy Level 10 in Environmental Science Level 9 in Organic Chemistry I Level 9 in English Grammar Level 8 in Anatomy & Physiology Level 7 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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