What are some high school grading scales?

High schools in the United States generally grade on either a letter-based system or number-based system. For the letter system, an A is generally 90 percent or above; a B is from 80 to 89 percent; a C is from 70 to 79 percent; a D is from 60-69 percent and an F is 59 percent or lower.

Grading scales can vary slightly from this basic model depending on the school. Some schools only give the percentage, and others are moving toward a grading model that leaves out letters or numbers entirely and focuses more on students' achievements of certain content standards.