Here are a few videos to have a look. they are all about our first Key Question "Were the peace treaties of 1919-23 fair?"
The Treaty of Versailles
The other peace treaties after World War One
Below are some useful websites for the different units covered in Year 10
https://www.mrallsophistory.com/revision/tag/treaty-of-versailles
chrome-extension://bpmcpldpdmajfigpchkicefoigmkfalc/views/app.html - this is a set of notes
https://igcseedexcelhistorynazigermany.weebly.com/reactions-to-the-treaty-of-versailles.html
https://www.bbc.com/bitesize/guides/zq6pmnb/test
https://www.i-study.co.uk/IGCSEHistory/Unit_1.html
https://www.bbc.com/bitesize/guides/z98xj6f/revision/1
https://www.slideshare.net/georgedumitrache399/cambridge-igcse-history-revision-2-league-of-nations
http://www.johndclare.net/league_of_nations1.htm
http://surviveigcse.blogspot.com/2014/05/league-of-nations.html
https://www.johndclare.net/RoadtoWWII1.htm
http://www.bbc.co.uk/bitesize/standard/history/1930_1960/road_to_war/revision/1/
http://www.bbc.co.uk/bitesize/higher/history/roadwar/
https://www.i-study.co.uk/IGCSEHistory/unit3.html
https://www.slideshare.net/brittzyxx/german-depth-study-igcse
https://www.mrallsophistory.com/revision/germany-1918-1945-depth-study-revision-quick-links.html
https://www.scribd.com/doc/314681760/IGCSE-HISTORY-Development-of-Dictatorship-Germany-1918-1945
http://www.crownhills.com/Downloads/German_Depth_Study_Revision_Guide%20STE.pdf - The last page isnt relevant for you.
http://igcsehistory.weebly.com/depth-study-germany-1918-ndash-1945-part-1.html