How does UCLA handle international students?

<p>Well, I'm from Brazil and I'm really planning on studying abroad. After A LOT of research, I fell in love with UCLA. But since I don't live in USA, I don't know how does the system works with international students. I had the great opportunity to start making the Texas Tech University high school program that started this year (I'm still in the first of the three brazillian high school years) and talked a lot with my teacher about it, but the brazillian grades aren't based on letters and also we don't have the gpa system. Biology, chemistry, physics, sociology, philosophy are obligatory in the three years, etc, ANYWAY... </p>

<p>do you think I have chances entering ucla in 2016? Do they evaluate international students the same as usa students (to enter the University)? What are the grades I need to have? Main question: do I need to have high grades in all of my subjects during the whole three years or I just need to have a great average grade of my three years no matter the subject? Sorry for my poor English, please help me!! </p>

<p>Also I'm aware of sat and toefl, but this should not be a problem :D</p>