I know that in high school a lot of students work in fast food. I did a lot of babysitting and actually made some pretty good money on that. If you enjoy dog walking and you develop a reputation for taking good care of the dogs in your charge and you're reliable there are a lot of people who are looking for someone. My sister was extremely talented and would knit one of a kind sweaters which earned her a tidy sum. Watch the job boards at school, the library, and community center, be willing to do those extra chores your neighbors are willing to hire you for. You never know when someone might call you out of the blue for a job because someone you worked for put in a good word for you for your dream job because they thought you were hardworking, reliable, and willing to do your best.