Missing content when opening a zipped level

Hello all,

I am currently in school and I am working on a team project with three others. I have made a level with props and I need to send it to my classmate for him to add more work into. My issue I am having is that when I send him my zipped unreal project with the content and config files inlcuded, when he opens it. What he is seeing is the standard scene for a level with starter content rather than my level with all of my stuff. Is there a solution to this because I cannot figure it out and it’s starting to worry me.