Table 2. Student lifestyle.

Feature	Description	Value
traveltime	Travel time from home to school	<15 minutes 15 to 30 minutes 30 minutes to 1 hour >1 hour
studytime	Weekly study time	<2 hours 2 to 5 hours 5 to 10 hours >10 hours
failures	Number of past class failures	n if 1 ≤ n < 3, else 4
schoolsup	Extra educational school support	Yes or no
famsup	Educational support from family
paid	Extra paid classes within the course subject
activites	Extra-curricular activities
nursery	Attended nursery school
higher	Plans for higher education
internet	Have internet access at home
romantic	In a romantic relationship
famrel	Quality relationship with family	Very low (1) to very high (5)
freetime	Free time after school
goout	Going out with friends
Dalc	Weekday alcohol consumption
Walc	Weekend alcohol consumption
health	Current health status
absences	Number of school absences	0–93