Three PowerPoints highlight an innovator-oriented history of the development of element concepts and illustrations from ancient history leading to the current operative periodic tables for study and professional use.

NGSS, and particularly Crosscutting, is particularly well related to the historic backstory, creative genius', and technology of the later builders of periodic tables.
            Science: Chemistry, scientific methods, parts of atom, periodic table, etc.
            Technology: Lavoisier: experimentation, lab analysis, Moseley: X-ray spectra, atomic numbers, Seaborg: element isolation, radioactivity
            Engineering: sorting and arranging: De Chancourtois' familiarity with geological & seismic recorder apparatus led him to a convenient helical portrayal of element arrangement, & Alexander re-integrated the f-block in the main body and completed the linking of the s-block with all the others at a common neXus
            Math: determination of percentages and other measurements, numeracy in general
            History: From Ancient Greeks through the European Middle Ages up to the present

These PowerPoints are designed to provide additional aid to the teacher who wishes to help students understand the process of arriving at the first periodic table, the minds and methods of improving on it in many ways, and the probability that the process is incomplete even now.

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