I assume that you're asking for guidance on how to best prepare yourself for the class and the material that will be covered.
The best thing you can do is to thoroughly review the syllabus provided by your teacher. Since every class is different, and many states have different curricula, it's hard for me to say exactly what will be covered in your class, or what your teacher will expect. These things should be described in the syllabus. Look for office hours, tutoring and tips that your teacher suggests. If these things are not mentioned, you should bring this up with your teacher and request them. Go to other economics teachers as well, and ask for their advice; remember that your teacher is not the only resource for this material, but since they are in charge of your grade, you should defer to their advice.
Another helpful tactic is to devote a certain amount of time to economics every day; focus on the habit, and not necessarily the content. If you can spend some time on economics, you will become more familiar with the subject faster than if you only allow it into your mind during the class. You can try reading an online newspaper article on economics every day.
Some other things you can do include:
- Start creating budgets. How much do your weekly groceries cost? What about the cost of transportation, including the money you would have to spend on maintenance and repairs for a bicycle or car? This will help you gain a personal insight into how economics affects your life.
- Research careers you're interested in, and find out what sort of salaries they pay.
- Talk to your parents about taxes; how do taxes affect their lives? Do they feel the taxes that they pay are fair?
Well firstly don't stress because its only the 9th grade. Think of your exam as more of a practice for the bigger upcoming exams in later years. To study for it I recommend getting past papers of the exams from your school. Then do these in time conditions so you get a feel for the exam. This is very helpful in preparations for the exam.