Jacobo was doing his physics exercises in a perfunctory way. Definition: A task completed without a lot of thought, a cursory effort, doing it to just get it done; the opposite of meticulous.
The cell phone was on the periphery of the desk and about to fall.
The ants were very pervasive and got in every corner of the school. to spread throughout or through all the parts of something A virus, an idea, a sickness, an attitude
To be philanthropic, the schools hosts Sharing Day every year with the kids from the public schools. Someone who does things to help others or mankind, through efforts or donations, or money - you don't have to be rich to be one
A particular slide catching your eye?
Clipping is a handy way to collect important slides you want to go back to later.