The Daily Herald reports two of the students were directly involved in the grade-changing. The others were aware that their grades were being changed.
School District spokeswoman Rosemary O'Neill says a student used a key logging device to record the sequence of key strokes the teacher used as a password for the electronic grade book.
They wanted to change their failing grades to passing and get academic credit for the class.
School staff investigated after receiving a tip. The school also brought the case to the Monroe police school resource officer.
O'Neill says the sad thing about the case was the students were so frightened of failing.