Boolean searching (named after George Boole) is used by most databases to focus searches. Examples of each term and search strategy are given below. A few tips to start:
Use AND to connect two or more concepts
classroom management AND student behavior
Some databases use "+" instead of (or in addition to) AND.
In addition to Boolean terms, search strategies can include other options including Proximity Indicators (e.g., NEAR, ADJ, and PRE), truncation or Wildcard symbols (?, and *), the hyphen (-), and specialized options (e.g. SAME or EXACT). See the Additional Search Options tab.
Use OR to connect two or more similar concepts (synonyms)
assessments OR evaluations
Here are a number of examples in combining three concepts with Boolean terms.
Use NOT to exclude concepts from your search.
osteoporosis NOT arthritis
Some databases use "-" or AND NOT instead of NOT.