Getting Rid of Ideas
Use the operator 'NOT' to eliminate words
Sometimes you want to eliminate certain concepts. This is where the NOT comes in. It directs the database to ignore records eliminated with NOT. Using NOT narrows a search.
students AND internet NOT elementary
Frankly, NOT can be very confusing. You also run the risk of eliminating articles that might have good parts that you want. Unless you really understand how to use NOT, it's best to leave it alone.