Scheduling is the job or activity of determining when specific tasks will be completed. Block scheduling, often known as blocking, is a method of academic scheduling in the American K-12 system in which each student has fewer classes each day. In middle and high schools, it is increasingly common. As a result, every lesson is scheduled for a lengthier time than usual (e.g., 90 minutes instead of 50). In one type of block scheduling, a single class meets every day for a certain number of days before being replaced by another class. On the other hand, Daily lessons rotate through a changing daily cycle. Blocks provide more full experiences of subjects, typically half as many if transferring schedules and daily classes.