OP, if you have the skills to do math tutoring, maybe you can shoot a series of video lessons and sell those, while offering one-on-one help for additional money. That would be more passive.
There's already some stuff like this on the market, but maybe you can find a niche (trigonometry for trannies) or something.
There's already some stuff like this on the market, but maybe you can find a niche (trigonometry for trannies) or something.