Experimental class: experimental field of credit system reform; It is the experimental area of compound application-oriented talent training mode; It is an important way for schools to build brands. Including all kinds of teaching reform experimental classes, curriculum reform experimental classes, mathematics experimental classes, and extraordinary children experimental classes. For example, the experimental class usually takes two years to complete the three-year junior high school teaching task and one year to prepare for the senior high school entrance examination, so that students have the opportunity to enter key high schools.

Parallel class: Medium class, in which there are most excellent students, but there are also some students with low and medium grades. In order to establish a competitive mechanism, students can stimulate their potential in this competitive environment and survive the fittest. Objectively speaking, there are differences between parallel classes and key classes, but subjectively speaking, they can be converted.