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You can gain the necessary experience to work with children by babysitting, tutoring, and by working at a day care or as an assistant in a preschool program. Offer to babysit or tutor friends', family members', or neighbors' children. You can also find babysitting and tutoring jobs through Internet job sites, like Craigslist or Indeed.  Try contacting schools in your area to see if tutoring opportunities are available. Preschool programs usually require teaching assistants to have either an associate's degree, or be in the process of completing a bachelor's degree. Apply for jobs at public, private, and charter schools. Make sure to check the qualifications before you apply. Most public schools and charter schools require teachers to hold a bachelor's degree and have the CDA certificate. On the other hand, private schools may only require you to have an associate's degree, as well as certification. Attend back-to-school job fairs for pre-k and elementary school teachers. You can search for local job fairs by visiting your local school district office, or by visiting school's websites. School websites sometimes post job openings and dates for upcoming job fairs.  You can also contact your local chamber of commerce to obtain a list of preschools in your area. You can also visit the websites of the biggest companies in your city. These companies sometimes offer daycare facilities to their employees, and may have job openings. Monster, Indeed, and Glassdoor are just a few examples of websites that regularly post preschool teaching jobs. You can also register with an employment agency that specializes in finding jobs for people in the educational sector, for example Earlychildhoodteacher.org. Write a two to three sentence personal summary at the top of your resume that briefly outlines who you are, your experience, and your goals. The next section should outline your academic qualifications, i.e., your degrees and certifications. Then, state each employer with a list that outlines your duties and responsibilities. After your work experience section, list key skills and competencies, like communication skills, creativity, organizational skills, and patience, for example. Ask for recommendations from previous jobs. Ask the parents of children you have either babysat or tutored for a personal recommendation. You can also ask the head teacher or leader of a daycare program or preschool you worked at for a professional recommendation. Common questions that an interviewer might ask are: "Can you tell me about yourself?" "If I were to walk into your classroom during a math or reading activity, what would I see?" "What are some of your positive guidance strategies?" "How will you communicate with families? and "What makes you the best candidate?"  Write-up and memorize your answers to these questions, then practice in front of the mirror. Some interviews might have multiple rounds. If you are called in for a second interview, you might have to demonstrate how you work with children, or come up with a sample lesson plan.
Obtain relevant work experience. Know your options. Attend job fairs. Explore job agency websites. Create a resume. Be ready for an interview.