I would make a few changes for spelling or grammar. I have crossed out words in the original text and added new language in boldface, as follows: Considering the fact that most lectures are based on the materials provided in a textbook, it will help your learning if you have a better idea on about the textbook you are working with. I mean, if you know how the textbook is organized and what information you can find through out each part of the textbook, such as golossay the glossary or index, it will be a great help.
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