Just go over your spelling, math, vocab and reading comprehension. Get a good night's sleep. Make sure you have all required materials ready and don't over think your anwers.
Be in really good shape when you arrive and pay attention in class. You are going to have full days of both academics and physical activities. Also alot of yelling in your face and taking orders.
I wouldn't want teachers being licensed to carry a firearm in school. My major concern would be a student could overpower the teacher, take his gun and no good will come out of this.
You can do it, if you're really try hard. You should be training now before you get to the academy, so you have a good chance of making it through the fitness tests. Good luck.
I have heard pleny of times someone failing their first poly test, they take it again they pass and get hired. Just remember to stay calm, be honest with all the questions and you'll pass.
Stay out of trouble and obey all traffic laws. Get a college degree. Stay in shape, do a lot of running, push ups, sit ups, and pull ups. Keep your credit in excellent standing.