Then summarize twice in slightly different wordings -- once for introduction and again for conclusion. Writing papers is easy.
Honestly, that's a pretty poor and redundant way to begin/end a paper. It comes off as amateurish and weird. The introduction should introduce and the conclusion should conclude. If your introduction and conclusion are serving the same purpose with slightly different wording, something's wrong.
Typically get A's on all my papers. Introduction and conclusion always do basically the same thing. Introducing your ideas always involves some summary of them. Concluding your ideas also involves summarizing them. They're both summaries worded for different purposes. Body of a paper states and explains your ideas in entirety with supporting information.
Honestly, I always thought it was wierd to repeat the same thing 3 times, but that's how I was taught to write papers and I've always received compliments on them from teachers. Perhaps it has something to do with short attention spans and/or memories, and people who read these things having to read A LOT of them. So beginning and ending with a summary is meant to keep the reader's perspective on track.
I never understood why people have so much trouble filling space in a paper, when you're usually expected to write this way.