Moriya, SeijiTan, YouichiKato, Takashi2023-06-072023-06-072023http://hdl.handle.net/2003/4154110.17877/DE290R-23384We would like to explain our concrete plans on the pre-service of mathematics education methodology in teacher training course of university. It is difficult for many pupils at elementary school to understand on Relative Value in Japan. Students at university, who want to be teachers, don’t understand Relative Value, sufficiently, too. We have taught the new teaching methods to students. They understood the meaning of Relative Value and learned how to teach it to pupils.enGesellschaft für Didaktik der MathematikPre-serviceRelative ValueElementary teacher training course of universityGrundschuleLehrerbildung (1., 2. und 3. Phase)Argumentieren & BeweisenArithmetik510conference contribution