As a student athlete, your academic performance is paramount, particularly if you are pursuing the college route. The higher your GPA (plus your SAT and ACT scores for the US-bound athlete), the more schools you will be eligible for. All the work you do on the ice and in the gym should not compromise the time and effort you put into your schoolwork. The two go hand-in-hand.
In fact, university coaches can only lobby so hard for your admissions approval. Based on the NCAA Academic Progress Rate (APR), collegiate sports teams must graduate a minimum percentage of players or risk losing scholarships.
So make it easier for yourself and your prospective collegiate coach. Work hard in high school to secure admission to the college or your choice. Once you're in, continue your academic discipline to stay on the team and to prepare yourself for employment following your collegiate playing days.