The effects of the vices mentioned earlier on health could also result to poor academic performance. Here are the proofs of declining academic performance – tardiness, absences, skipping classes, poor motivation, loss of interest – all could result to failing grades. * Loss of interest/ poor motivation

* Poor health/ smoking
First, it may affect the physical energy level of a child which determines the time (including classroom attendance and after school educational activities) that can be used for learning. Second, it affects the child’s mental status that may have a direct impact on academic performance. Third, a child’s health status may affect the way her teachers, parents and peers treat her; this in part shapes the learning environment that she encounters. The first two channels directly affect own health input (both physical and mental) in the education process while the third influences a child’s education outcome through other inputs such as peer quality and teacher attention that is the result of a certain health status. * Alcohol
Difficulty meeting academic responsibilities is one of the most common consequences of alcohol use. The National Institute on Alcohol Abuse and Alcoholism (NIAAA) Task Force on College Drinking reports that about 25 percent of college students report academic problems caused by alcohol use, such as earning lower grades, doing poorly on exams or papers, missing class, and falling behind.
According to a national study of more than 14,000 students, 21.6 percent of students who drank during the year prior to the study had fallen behind in their schoolwork and 29.5 percent had missed class because of their alcohol use.
In addition to well-documented consequences such as poor performance on assignments and missed classes, studies suggest that college drinking is a major factor in student dropout rates. * Computer