The word linear is never used in that part of the standard, nor is any relationship to calculus expressed explicitly (and there is not really any relationship to anything else, just saying that a matrix can be used to express incidences in a network is useless if they never study networks). Probably because calculus is not part of the CC standard, which is my point exactly. Besides, Common Core is not what most living people in the US experienced in school.<p>I have seen the standards for high school math teachers and trust me, they are low. Most of my classmates in undergrad (which was supposed to be an <i>excellent</i> program for math teachers) are now high school teachers. Their complaints about how much they hate basic linear algebra and &quot;just want to be done with it so they can go teach high school&quot; are still ringing in my ears.