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The Crabby Doc

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Hello, my name is Lynda Harmon and I am in my 8th year of teaching secondary science. I have taught a range of STEM courses, including Biology, Chemistry, Physics, Technology, Environmental Science, and AP Chemistry. Prior to becoming a teacher, I was a research scientist studying the growth and progression of various cancers. I hold a B.A. in Biology, an M.S. in Education, and a Ph.D. in Physiology and Biophysics. My goal is for every student that I have the joy to teach to discover the beauty and complexity of science. I focus not only on learning and memorization of the content, but also teaching students to think and reason as a scientist would.

  • Atomic Mass Worksheet

    Atomic Mass Worksheet

    10 short answer questions to test students understanding of atomic mass, weighted average, isotopes, and percent abundance. This worksheet asks students to apply the concepts. It does not ask students to calculate atomic mass. Visit The Crabby...

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  • Atomic Model Task Cards

    Atomic Model Task Cards

    Enclosed are 20 atomic model task cards that review the major atomic models from the 19th and 20th centuries with a particular focus on the application of the quantum mechanical model. Models covered include: Dalton's atomic model Plum pudding...

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  • Atomic Number Worksheet

    Atomic Number Worksheet

    Worksheet that requires scholars to use the periodic table to identify the atomic number of various elements, the number of protons, or electrons, or the identify of the element. Includes an answer key. Visit The Crabby Doc for more resources. 

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  • Balancing Chemical Equations

    Balancing Chemical Equations

    Attached you will find a tried and true method to teach balancing chemical equations to learners of all abilities.  Balancing chemical equations is a skill that can be challenging for many students.  Because it is often presented in class as...

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  • Sample Background Information Page

    Cellular Respiration Lab

    This laboratory investigation explores cellular respiration in a novel manner.  Students will use yeast as a model organism and test various "energy drink" recipes for their ability to produce energy.  The lab uses basic science supplies, does...

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  • Create Your Own Valentine: A Genetics Activity

    Create Your Own Valentine: A Genetics Activity

    In this fun review activity, students create their own Valentine create using traits "inherited" from their parents. A list of 5 traits is inherited based on probability and the roll of a dice. The students then figure out which of the phenotypes their...

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  • Ionic Bonding Task Cards

    Ionic Bonding Task Cards

    20 engaging task cards covering a variety of topics related to ionic bonds. Students will explore ion formation, cations versus anions, identifying valence electrons, creating Lewis dot structures/electron dot structures, recognizing ion charge, and...

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  • Momentum Task Cards

    Momentum Task Cards

    A set of 20 momentum task cards that reviews and applies the basic principles of momentum including: momentum impulse bouncing collisions conservation of moment   The problems also include multiple math...

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  • Scientific Notation Go Fish

    Scientific Notation Go Fish

    Help your students understand the basics of scientific notation with a fun game of Go Fish!  Students will work in teams to pair 27 unique standard/scientific notation pairs playing the classic card game.  Product is a downloadable PDF with...

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  • The Density Lab

    The Density Lab

    A hands-on application of density, this lab explores the effect of increasing liquid volume on the floating of a solid.  While a simple lab to perform, it allows the teacher the ability to identify misconceptions about the concepts of density. ...

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