summary

An overview of content that provides a reader with the overarching theme, but does not expand on specific details. A summary describes a larger work (such as an entire book, speech, or research project), and should include noticeably less content then the original work. Summaries can save a reader time because it prevents the reader from having to actually go through and filter the important information from the unimportant.

"Ben was able to review the well-written summary provided by his peer, instead of re-reading the entire textbook, and as a result he still received an A on his mid-term."

from www.businessdictionary.com

overarching
頭上でアーチ状になっている
全体にわたる、包括的な

peer
同等［同格］の人、対等者

noticeably
〔変化などが〕目に見えて、著しく