Do you have senioritis?
"Senioritis" is a common phenomenon and stereotype where high school students (and occasionally college students) suddenly become much more lazy and apathetic towards school during their senior year, especially in the second semester of the year. Senioritis is an actual term in the English dictionary, and is sometimes even classified as a real, serious disease.
Senioritis usually begins in January of a student's senior year, although it can occur at any time. Symptoms of senioritis include decreased motivation, worsening performance in school, and excessive absences or behavior issues.