I'm confused about the adverb placement. I heard that adverbs that indicate manner should be placed at the end of a sentence, but I have seen many sentences that do not follow this rule. For some sentences, it sounds awkward if I place the adverb at the very end.
Which is correct?
In order to help him learn the concepts and techniques skillfully, did you ensure that you prepare the lessons?
Did you define the terms to students precisely, clearly, and nicely?
OR
In order to help him skillfully learn the concepts and techniques, did you ensure that you prepare the lessons?
Did you precisely, clearly, and nicely define the terms to students?