SAT Prep Course?

<p>I'm a high school sophomore and I took the PSATs in the fall, getting a 213 overall. This put me in the top 99%, but I'm hoping to get in the 2200s or 2300s on my SAT- should I look into taking an SAT prep course over the summer to boost my grade, or will I be able to bring up my score just through more practice?
Thank You!</p>