Math League is a Math competition for elementary, middle, and high school students in the United States, Canada, and other countries. Their purpose is to provide students with "an enriching opportunity to participate in an academically-oriented activity" and to let students "gain recognition for mathematical achievement".  They offer two contest formats to Public School students:

Grades 4-5: multiple-choice questions to solve in 30 minutes, covering arithmetic and basic principles

Grades 6-8: multiple-choice questions to solve in 30 minutes, covering advanced arithmetic and basic                     topics in geometry and algebra