Having periods of 45-minute durations facilitates student's abilities to constructively attend to task during their high school classes. 

The High School Program is NOT semestered - thus allowing students to have the whole school year to study each course they are enrolled in.  This routine of timetabling allows for daily reinforcement of concepts and skills, enabling the students to process concepts more readily and to develop their skills on a continual basis. 

In addition, allowing students to have the same schedule each day of the week helps to provide the organization and structure that they generally need.