1, the entry threshold is different. A+ class aims at school performance and does not need special tests; Class S is aimed at students who have excellent academic performance and need to take exams to reach the standard.

2. The teaching content is different. Half of the teaching content in Class a+ is synchronized in the school, and half of the content has been expanded and improved, which has improved the scope of knowledge and the depth of classroom explanation is average; Class S is similar to the Olympiad, with pure expansion and perfection and deeper explanation.

3. Learning and thinking difficulties are divided into five classes, which are excellent classes in the school, target A+ class, target S class, quality literacy class and interest class. Different classes have different difficulties, so they have different requirements for children's learning foundation.