Formats used in block scheduling have a common goal of allowing schools to adopt a flexible program that responds to the needs of students and schools. Which of the following is not a block scheduling format?
1) Students take semester long courses with 55-minute classes that meet five times a week totaling to 550 minutes every two weeks.
2) Students take four classes on one day and four different classes the next day.
3) Students take yearlong courses that are converted into half year or semester courses of 90-minute period classes.
4) Students participate in a four-period day, with the entire block lasting for 12 weeks and with only two course.
