Your best bet is probably to talk to some company that's selling arithmetic-improvement books and mind-skill books, even mind-improvement software and offer to

Your best bet is probably to talk to some company that's selling arithmetic-improvement books and mind-skill books, even mind-improvement software and offer to advertise for them. Just tell them up front what they will have to pay etc.. You could also search for affiliate networks that have some of those categories, but that will probably not pay off as much. I can't see that you'd be able to make any money selling access to your software unless you added some more benefits and made a full product out of this, where you'd actually be helping the user improve his math skills. Heck, I think I'd use that, my arithmetic skills are really poor (despite being a decent developer) and I'd like to improve them. Your last option would probably be to try to get some partnership with other companies or offer schools or websites in this category white-labeled version of your software so they can set up a widget of your application on their website for value addition, etc. Come to think of it, that might be your most lucrative option, plus you get more users and can continue to develop and add more value for the user...