"Education without class" embodies the concept of educational equality. This thought emphasizes that education should not be restricted by social status, wealth, race and other factors, and everyone should enjoy equal right to education. "No Child Left Behind" emphasizes the universality and inclusiveness of education, and advocates that education should be geared to all individuals, regardless of their background, and they should have the opportunity to receive education in order to achieve personal growth and social progress. In modern society, the concept of educational equality has been widely recognized and practiced. Governments around the world, through legislation and policies, strive to protect everyone's educational rights and interests, promote educational equity and promote social harmony and stability, which is not only the core concept in the field of education, but also an important symbol of social civilization and progress.