One of the best and most consistent ways to make money online if you're a teen is online surveys. These surveys are usually around 15 minutes long and pay from $2 to as much as $75!
One of my favorite survey sites is called Global TestMarket. Global TestMarket sends me surveys atleast 4-5 times a week and each one is about 15 minutes long. Global TestMarket pays through points which are redeemable as cash through check or PayPal. When you get 1000 points they send you $50. Each survey pays about 50 points so you only have to do 20 surveys to get $50!! I get about 5 surveys a week and if you are in the right demographic you might get even more. So at that rate you can get a payout of $50 about every 4 weeks. That is $650 a year from one site!!! In order to get that many surveys, however, you must complete the profile surveys after registration. These surveys not only get you more surveys that you will qualify for and that you will want to take but they pay you 10 points per survey. That is $5 to just complete the short profile surveys. You also earn $1 for every friend that you refer. In my opinion this is one of the best opportunities for teens to make money online, but check it out for yourself here!