Re: To what extent was the Great Depression responsible for collapse of Weimar Republ
So far you're on track, you have a thesis (i.e. your opinion) and some reasons, however, I dont think those reasons are strong enough. Focus more on the rise of Nazism and maybe the ToV or another factor.
Here's how I would set it out:
Intro: The GD was somewhat responsible for the collapse of Weimar.
Para One: Reasons why the GD caused the collapse of Weimar.
Para Two: Reasons why the Rise of Nazism caused the collapse of Weimar.
Para Three: Reasons why the ToV/another factor caused the collapse of Weimar.
Conclusion
For more detailed stuff on how to write the essay, check out my essay guide (a link is in my sig). Also keep in mind, that when discussing other factors, you have to directly indicate that they played a role in addition to the GD.