I want to upload my Documents, Videos, Photos, Tables. Materials to include in my course. How can it be done?

My Course is very different than what khan academy is proposing in ASSIGN. I am a teacher and i have my own course content.

I want to upload and put online all the text i have written that constitute my course. I have spent days searching in the khan help center but there is nothing on how to upload the information that i teach. Which is not logical. I cannot teach if i am not able to publish my lessons.

Can you please answer me it is possible to publish my own lessons on khan? if it is possible, please tell me where to click.