More and more parents, educators and administrators are turning against the traditional grading system of public schools. Grades, these people argue, are harmful to students in a variety of ways. Instead of loving to learn, grades force students to learn for an external motivation. Grades also affect a teen's self-system, reducing entire identities down to a letter. Grades also make students unnecessarily competitive with one another.

Read the sentence a student wrote. as he listened to the haunting notes of the song the author realized he had found the inspiration for his next suspense novel. the teacher reviewing this sentence would point out that since this is a complex sentence, there should be a comma after “song.” compound sentence, there should be a comma after “realized.” complex sentence, there should be a comma after “inspiration.” compound sentence, there should be a comma after “found.”