Students are often asked to explain, describe or discuss what they have learned, and often this is done by writing. Describing what you learn can be dangerous, however, if you are not aware of, or do not follow, guidelines on plagiarism. Download these great resources (shoot; I wrote one of them myself!) or visit these shepherding sites.
Writing
How to Write a Science Essay
An essay about how to write an essay. (Actually it was the most fun I had writing an essay to date!)
Plagiarism-U of Toronto
If you are going to work hard at writing, don't sabotage your own work with plagiarism: the kiss of death, or hemlock for writers.
Plagiarism-WISC
Don't euthenize your own writing - be original and credit the owners of the shoulders you are standing on!