It seems that applying to 9th grade this fall in USA is late. However it does not mean that application season is over. If you still want to apply for the fall, you should start asap with all requirement such as tests, GPA, application forms. Selecting a school is not an easy task. You do want to make the best decision based on what you currently have in terms of qualification. Please find someone who can help you and you should start ASAP if you do it by yourself.。