Curriculum is very important for the future of nation. So, continuous efforts are needed to improve the curriculum. This study looked into the issues and the problems related with the 7th differentiated mathematics curriculum, and gave the message about the methods of implementation. For this, we analyzed the result of the questionnaire survey which consisted in the question about the 7th differentiated mathematics curriculum. 264 high school teachers are participated in this survey. In special, this study gave not only the problem but also the various concrete methods for management of the 7th differentiated mathematics curriculum. We hope that mathematics education members research and argue about the differentiated mathematics curriculum for next curriculum.