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.
Cambridge Rindge & Latin School
Cambridge Rindge & Latin School: Writing a Statement of Purpose
An excellent tip sheet for creating and perfecting a statement of purpose. Also includes information about thesis statements and examples.