[Adjective] Trying to control or influence other people for your own benefit or advantage. Example: The manipulative boss asked his workers to spy on other people and report back to him, in return for a pay increase.
Found on http://www.bbc.co.uk/skillswise/glossary/
[mathematics] In mathematics, a manipulative is an object which is designed so that a learner can perceive some mathematical concept by manipulating it, hence its name. The use of manipulatives provides a way for children to learn concepts in a developmentally appropriate, hands-on and an experiencing way. The use of manipulatives in mathem... Found on http://en.wikipedia.org/wiki/Manipulative_(mathematics)