A 15-year-old can provide tutor services for classmates or students in younger grades for commonly misunderstood subjects, such as math and science. A teenager can also provide babysitting services for neighbors by watching their children after school and before parents arrive home from work.
Pet-sitting is another good job for a 15-year-old. Neighbors may need to have their pets walked, fed and taken to the dog park for play time, and they may need pet cages cleaned. Landscaping jobs are also a good fit for teenagers. They can mow lawns, pull weeds and shovel snow from driveways and walkways.
Many golf courses use the services of a teen to caddy for older golfers. Many little league sports clubs require the services of young people to referee the games. Young people can serve as counselors at summer camps for kids. Teenagers make good car wash attendants. They can also wash and detail neighbor's cars and help elderly neighbors by purchasing groceries, transporting clothes to and from the cleaners or returning books. Youngsters who are both creative and computer-savvy can sell arts, crafts, antiques and yard sale finds on Internet websites, such as eBay and Etsy.
Many of these jobs are paid services that require initiative and a business-like demeanor from the 15-year-old. These services can be advertised by passing out fliers in the neighborhood or posting ads in a neighborhood newsletter. Parents can help advertise by word of mouth and referrals.