A thesis statement describes your topic and your position on that topic. A thesis statement should express an opinion, not a fact. The thesis statement tells the reader what you will be arguing for or against in your paper, and should generally be placed towards the end of your introductory paragraph.
Basic components for a thesis-based writing assignment
An organizational statement may be used along with a thesis statement to lay out the structure of your paper. Organizational statements are not always required, but can make your thesis statement and your writing stronger. In an organizational statement you lay out what major pieces of evidence you will use to back up your thesis statement. For best effect, the thesis statement and organizational statement can be written as wone sentence. If you choose to use an organizational statement, be sure to write following the structure that you have outlined in that statement.
These websites provide detailed information about writing thesis and organizational statements.