We had to study this in year 11. Try looking at:
the unrest in the cities - poor living and working conditions
the spread of communist and socialist ideology within the proletariat
the Tzar as a leader. Did his personality fit the role and why did he stay in control?
The role of the 1905 revolution
Rasputin and what the people thought of the Tzarina
The role of WW1.
I found it good to compare and contrast statistics from before and after WW1 so that you could clearly see how bad things got. Also the last days before the provisional govt. took control of the country.
Hope that helps