Tracking (education)
（重定向自Grouping by ability）
Tracking is separating pupils by academic ability into groups for all subjects or certain classes and curriculum within a school. It may be referred to as streaming or phasing in certain schools. In a tracking system, the entire school population is assigned to classes according to whether the students' overall achievement is above average, normal, or below average. Students attend academic classes only with students whose overall academic achievement is the same as their own.