FREE chemistry interactives designed by Roy Alexander
...three-dimensional chemistry models & manipulatives.
Currently concentrating on improving understanding of the Periodic Law and Periodic Tables, Roy has developed free downloadables employing NGSS and cross cutting for teaching/learning with element property trends manipulatives for multiple grade levels, DIY periodic table creation 'cards' also for multiple grade levels, a series of Power Points outlining the history of periodic tables, and lessons that bring them all together.Teaching the Periodic Law with evidence by
the Chemical Element System model
...the exciting & motivating 3D classroom size model of the AAE, by adhering strictly to the Periodic Law, and when in classroom introduction prior to the Periodic Table, tangibly validates the former while deflecting criticism of the latter for the inability - in 2D - to show element relationships both continuous in atomic number sequence and with all property related elements contiguous.
Learning is Better: Starting with the Chemical Element System's accuracy, students recognize that previously perceived periodic table faults are unavoidable if all the elements are to be seen at once - the very feature of periodic tables that allow the DOING of chemistry!The LEGENDARY Alexander Arrangement DeskTopper
...a personal model for students
Teachers, inserting the DeskTopper or the larger Illustrated AAE into the curriculum just prior to the trends lesson will find that by initiating students to a more correct form of the flat table - obeying the the Periodic Law - will speed and improve learning by adding credibility to the flat table - where all the elements are visible at a glance!.
|the Periodic Law is a Helix - modeled today by the Alexander Arrangement of Elements
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Last Update 4/24/19