S1-c: Repeated words

S1-cRepeat function words to clarify parallels.

Function words such as prepositions (by, to) and subordinating conjunctions (that, because) signal the grammatical nature of the word groups to follow. Although you can sometimes omit them, be sure to include them whenever they signal parallel structures that readers might otherwise miss.

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A second subordinating conjunction helps readers sort out the two parallel ideas: that left-handed students have trouble with classroom desks and that rearranging desks was useful.