Readingplus itself has a very rigorous and scientific scoring system: according to the number of words in the full text, the number and proportion of high-frequency words, the number and proportion of low-frequency words, the length of sentences, the complexity of sentences, sentence patterns, illustration information, ideological depth and theme.

This is a very huge English graded reading system, and its complexity is no less than the relationship between the various groups in the Oxford tree.

Readingplus is a set of graded reading materials officially launched by American education company LearningA-Z in 2002. Different from other graded books, it is mainly electronic resources: students who buy accounts have corresponding electronic accounts, and after entering their own accounts, they can see what books they should read.