The teaching materials that can be used in learning are only textbooks, the problems in the textbooks do not contain problems regarding everyday life so that learning is felt by students to be less meaningful and boring. The purpose of this study was to produce and determine the validity of Contextual Teaching and Learning (CTL) based Student Worksheets (LKS) with Environmental Education which are suitable for use in learning mathematics on the subject of Associations in class VII SMPN 4 Sungai Penuh. This development method uses the ADDIE model, this research consists of 5 stages, namely analysis, design, product development and manufacture, implementation, evaluation. This research was conducted at SMP Negeri 4 Sungai Penuh in grade VII . The results of this study indicate that the mathematical worksheets are valid and feasible to use from an expert point of view, the use of worksheets in the learning process is able to make students active and make the learning process student-centered.
