sorry this may be a little off topic but how do ya know that you will be able to do an extended project at your school next year and how do you know what you will need to do for it, etc..?
I thought people did their extended project in year 13?
Anyway, what aspects of feminism are you interested in? Philosophy? Sociology? Law? Beauty? Family? Work? Language? Literature? etc.
Yes, echoing the sentiments of the last poster; for which subject? Narrow it a little for us and we'll be able to help more.
Why do you have to specify the Suffrage movement? How about "How has the role of females in British society evolved from the Victorian era to the present day"?
Remember that actually only a proportion of the marks go on the actual paper and a lot on the planning, the log and the research.