tracking
noun [ U ] uk/ˈtræk.ɪŋ/ us/ˈtræk.ɪŋ/
US (UK streaming)（学生依能力编排的）班，组
the act of putting students with similar abilities in a group and teaching them together
Some people object to tracking because it gives an unfair advantage to intelligent children. 有些人反对把学生按能力分班，因为这给了聪明的学生优惠待遇，很不公平。