Any object used to help students understand abstract ideas For example - students bundle straws in groups of ten to understand place value of numbers (46 = 4 bundles of ten and 1 of six)
Manipulative experiments involve two or more experimental variables They must be designed carefully to avoid ambiguous results Contrast with a mensurative experiment
disapproval If you describe someone as manipulative, you disapprove of them because they skilfully force or persuade people to act in the way that they want. He described Mr Long as cold, calculating and manipulative