Math With Bad Drawings had a terrific series on how students try to avoid thinking in math class. A quote:
In teaching math, I’ve come across a whole taxonomy of insidious strategies for avoiding thinking. Albeit for understandable reasons, kids employ an arsenal of time-tested ways to short-circuit the learning process, to jump to right answers and good test scores without putting in the cognitive heavy lifting. I hope to classify and illustrate these academic maladies: their symptoms, their root causes, and (with any luck) their cures.
Here is Part 1, introducing the series: http://mathwithbaddrawings.com/2015/01/07/how-to-avoid-thinking-in-math-class/