"Reading, writing and arithmetic" is the abbreviation of reading, writing and arithmetic, which is internationally recognized as the basic scientific and cultural quality of students in the basic education stage. Because the initial letter of English is R, 3R is commonly used internationally to collectively refer to students' basic scientific and cultural qualities. Educators all over the world agree that literacy is the basic ability that basic education should focus on, and basic literacy skills are the basic requirements of basic education. Whoever has mastered 3R will have mastered the quality of basic education. It is also in this sense that the title "reading and writing" is used.