The word you are looking for is "valedictorian". The specific selection criteria is up to the school or school district which you attend. It is typically based on achedemic excellence, as measured by grade point average, but may include other factors. See http://en.wikipedia.org/wiki/Valedictorian for more details.
The person who has the highest grade out of their whole class for every class. Your report card should tell you where you placed. If you placed first then your the valla victorian. Or your class can nominate you too. It all depends on your high school.
Because she is a badass!
Giorgio Valla died in 1500.
Trebisonda Valla died in 2006.
Lorenzo Valla died in 1457.
Esat Valla was born in 1944.
Kristin Valla was born in 1975.
Kristin Valla has written: 'Muskat' 'Nutmeg'
Valla Dio of the Maldives died in 1258.
Trebisonda Valla was born on May 20, 1916.
Trebisonda Valla was born on May 20, 1916.
Peter Valla was born on 1990-03-20.