manipulative

manipuloiva, manipulatiivinen Using manipulation purposefully.
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Tending to manipulate others.
puhekieltä Reaching one's goals at the expense of other people by using them.
A manipulable object designed to demonstrate a mathematical concept.
{{quote-journal|date=April 25, 2008|author=Kenneth Chang|title=Study Suggests Math Teachers Scrap Balls and Slices|work=New York Times|url=http://www.nytimes.com/2008/04/25/science/25math.html
(de-inflected form of)