Angela, you don't mention what grade you are applying for. If it is a non entry level grade, tiers are not used in the selection process, so you won't have to worry about that. If, however, you are looking for a spot for an entry level grade (K, 7th grade Academic Center, 9th grade), you would only get an acceptance for a "rank" spot which is the top 30%. Typically, a very high score is needed for an offer for a rank spot.