If you want it in writing, you should specify writing.
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vsureshYou must practice writing poetry analysis.The person must practice the art/technique of writing poetry analysis. That is, the focus here is on the writing.
vsureshYou must practice poetry analysis.The person must practice the art/technique of poetry analysis. The
XerxesThis is not entirely clear to me, what you want, but I'd say the first sentence ("You must practice writing poetry analysis") is probably better.I mean the idea in the bracket only.