Other
Research Assistant: For Students: Purpose Statement
This site gives advice on how to write an effective purpose (thesis) statement. The summary is given as answers to four questions: what? why? when? how?.
University of Washington
Guide to Writing Thesis Statements
These guidelines show how to write effective thesis statements with examples of effective and ineffective statements.
Other
Paradigm Online Writing Assistant: Occasions for Thesis/support Essays
The basic thesis/support pattern promotes clear, systematic thinking on a single subject and can, therefore, be helpful whenever you want to set forth ideas and facts in an efficient, orderly way.