As a General rule, student may work from the age of 15. But there is a subtlety - the employment contract are entitled to conclude a person over the age of 16. A 15-year-old that's up to his parents. This is important because unscrupulous employers can refuse to conclude an employment contract with 15-year-old is under the pretext that he is still not entitled to conclude it. The lack of an employment contract can lead to the fact that the work simply does not pay.
Students aged 15-16 years can pass out flyers, working social research interviewing ads, street vendors of water and snacks. Such work is easy to get, but pay for it a little - boy or girl, at the metro handing out flyers, any company, can get it for around 300 rubles per hour. Despite the seeming simplicity, this work is quite physically heavy. To get 900 rubles, will have 3 hours to stand in one place without sitting down and never leaving. The majority of firms supervises those who are handing out their leaflets, and if the "controller" will notice that you are left with a put the place you can not count time.
If you are 16-17 years old, you can take a waiter or cashier in a fast food restaurant. You can also work as a courier or in the call center. Usually such positions are taking active seniors.
If you are unable to find a position listed above, you should not be surprised, because not every employer wants to take a minor worker. The labour law more strictly controls the employment of minors. In such jobs, often expect students of younger courses, which creates high competition.You can try to find work on the Internet on sites for freelancers (those who work remotely, from home). Often on these sites are looking for someone who can perform the most simple job - to get handwritten text, to rewrite the article in your own words, to find something in the network, to raise the rating of the forums...it all depends on what you know and love. From your skills depends on your income. A reprint of the text are unlikely to pay much, but for the development of the site can pay very well.
No matter what you are looking for a job, remember that not all employers are conscientious. Some might refuse to pay for your labor. Be sure to enclose the contract of employment (themselves or with the help of parents). If you have an employment contract, payment of your work will be to recover through the courts. If you are working on the Internet, ask for an advance payment or send only part of the work to transfer money to your account.