Tutoring math, terms can be interesting. The tutor mentions idempotent. idempotent (adj): repeatable without further result, or unchanged by repetition of an operation. Source: encylopediaofmath.org

Tutoring English, discoveries continue. The tutor mentions exurb. exurb: a town outside a larger city, located past its suburbs. Source: Barber, Katherine et al. Oxford Canadian Dictionary of Current English. Don Mills: Oxford University Press, 2005.

Tutoring English, discoveries continue. The tutor mentions pre-emption. pre-emption (noun): an action that successfully replaces or prevents another. Source: Barber, Katherine et al. Oxford Canadian Dictionary of Current English. Don Mills: Oxford University Press, 2005