No significant differences were found between the two groups for language mechanics. (promisingpractices.net)
How important is it to explicitly teach language mechanics, such as spelling, vocabulary, and sentence construction? (ascd.org)
I'm talking about using the numeral «4» than the preposition «for» — girls can grasp the subtle complexities of language mechanics just as well as boys! (thatvideogameblog.com)