The purpose of this study is to develop learning materials based on realistic mathematics education approach that are valid, practical and effective to improve problem solving skills and learning independence of class VII students. This research is a development research that uses a design model for materials development according to Thiagarajan, et al. namely 4-D. This trial was carried out in classes VII-3 and VII-4 Padangsidimpuan 5 Middle School. From the results of the study, it was found that developed devices were valid with an average total validity of RPP = 4.46, student books = 4.41, teacher’s books = 4.38, LAS = 4.31; then a practical device can be implemented, with an average of 85% and 91.25%. and effective devices, in terms of a) classical learning completeness of students in 62% I test increased in trial II has reached 92%; and b) student responses to the components of positive learning. Based on the results of the study it was suggested that mathematics teachers can facilitate mathematical learning using quality learning materials and especially by using learning based realistic mathematics education approach.

• Akbar, S. (2013). Learning Instrument. Bandung: Remaja Rosdakarya.
• Ammamiarihta., Syahputra, E., & Surya, E. (2017). Development of Learning Devices Oriented Problem Based Learning to Increase Student’s Combinatorial Thinking in Mathematical Problem Solving Ability. Annual International Seminar on Transformative Education and Educational Leadership (AISTEEL 2017), 104, 334-339. https://doi.org/10.2991/aisteel-17.2017.71
• Arends, R. I. (2008b). Learning to Teach, Belajar untuk Mengajar. Edisi Ketujuh. Jidil Dua. (diterjemahkan oleh Soedjipto, Helly, P. dan Soedjipto, Sri, M.) Yogyakarta: Pusataka Pelajar.
• Arikunto. (2012). Basics of Educational Evaluation. Jakarta: Bumi Aksara.
• Dahlan, J. A. (2012). Implementation of Cognitive Conflict Learning Strategies in Improving Efforts High Order Mathematical Thinking Siswa. Journal of Education, 13(2), 65-76.
• Daulay, A. S. (1998). Educational Sciences. Medan: CV Jabal Rahmat.
• Fahradina. N., Ansari, B I., & Saiman. (2014). Mathematical Communication Capability Enhancement and Learning Independence of Middle School Students Using Group Investigation Models. Mathematics Didakti Journal, 1(1), 54-64.
• Fauzan, A., & Yerizon. (2013). The Effect of the RME Approach and Learning Independence on Students’ Mathematical Ability. Prosiding Semirata FMIPA Universitas Lampung, 7-14.
• Herman. (2012). Development of Learning Devices Direct Teaching Models to Teach Equivalent Material to Equivalent Objects. Journal of Physics and Education, 8(1), 1–11.
• In’am, A. (2014). The Implementation of the Polya Method in Solving Euclidean Geometry Problems. Internasional Education Studies, 7(7), 149-158. https://doi.org/10.5539/ies.v7n7p149
• Ja’far, M., Sunardi, & Indah, A. K. (2014). Development of Consistent and Thorough Character Based Learning Devices Using Realistic Mathematics Education (RME) Approach in the Chapter of Constructivity and Kekongruenan Build Flat Class IX SMP. Jurnal Edukasi UNEJ. I(3), 29-35.
• Laurens, T., Adolfina, F. B., Rafafy, J. B., & Leasa, M. (2017). How Does Realistic Mathematics Education (RME) Improve Students’ Mathematics Cognitive Achievement? EURASIA Journal of Mathematics, Science and Technology Education, 14(2), 569-578.
• Maulydia, S. S., Surya, E., & Syahputra, E. 2017. The Development of Mathematic Teaching Material Through Realistic Mathematics education to Increase Mathematical Problem solving of Junior High School Students. International Journal of Advance Research and Innovative Ideas in Education (IJARIIE). 3(2), 2965-2971.
• Mu’tadin, Z. (2002). Independence as Adolescent Psychological Needs. Retrieved from http://www.e-psikologi.com/remaja.050602
• Mulyono, A. (2003). Education for Children with Learning Difficulties. Jakarta: Rineka Cipta.
• Nieveen, N. (1999). Prototyping to Reach Product Quality. In Jan Van den Akker, R.M. Branch, K. Gustafson, N. Nieveen & Tj. Plomp (Eds). Design Approaches and Tools in Education and Training (pp 125-135). Nederlands: Kluwer Academic Publishers.
• Pratama, S., Minarni, A., & Saragih, S. (2017). Development of Learning Materialss Based on Realistic Approach Integrated Context Malay Deli Culture To Improve Ability of Understand Mathematical Concepts and Students’ Self-Regulated Learning At SMP Negeri 5 Medan. Journal of Mathematics (IOSR-JM), 13(6), 18-29.
• Purnamasari, Y. (2014). The Influence of the Cooperative Type TGT Learning Model on Learning Independence and Increasing the Reasoning and Mathematical Ability of Students of Tasikmalaya 1 Junior High School. Journal of Education and Teacher Training, 1(1), 1–11.
• Purwanti, D. (2017). Development of Learning Tools Oriented Problem-Based Learning to Improve Problem Solving Capabilities and Student Learning Independence of SMA 1 Kualuh Selatan High School (Unpublished thesis). Medan: Post Graduate Program UNIMED.
• Rahman & Amri. (2013). Strategy and Design of Learning System Development. Jakarta: Prestasi Pustaka.
• Riduwan. (2010). Easy Learning Research for Teachers-Employees and Beginner Researchers. Bandung: Alfabeta.
• Riskasusanti, D., Fauzi, KMS. M. A., & Simbolon, N. (2017). Development of Materials to Improve the Ability of Resolution and Disposition Mathematic Through Mathematical Approach Realistic in Class V SD Negeri Lamsayeun Aceh Besar. Journal of Education and Practice, 8(24), 42-51.
• Rohmah, M., & Sutiarso, S. (2017). Analysis Problem Solving in Mathematical Using Theory Newman. EURASIA Journal of Mathematics, Science and Technology Education, 14(2), 671-681. https://doi.org/10.12973/ejmste/80630
• Rusman. (2012). Learning Models: Developing Teacher Professionalism. Jakarta: Rajawali Pers.
• Sanjaya, W. (2009). Learning Strategies Oriented to Educational Process Standards. Jakarta: Kencana.
• Saragih, S., & Habeahan, W. (2014). The Improving of Probem Solving Ability and Students’ Creativity Mathematical by Using Problem Based Learning in SMP Negeri 2 Siantar. Journal of Education and Practice, 5(35), 123-132.
• Saragih, S., & Napitupulu, E. (2015). Developing Student-Centered Learning Model to Improve High Order Mathematical Thinking Ability. International Education Studies, 8(6), 104-112. https://doi.org/10.5539/ies.v8n6p104
• Sarah, N. (2017). Development of Learning Devices Based on Realistic Mathematical Approaches to Enhance Mathematical Representation Capabilities and Self Efficacy of Students. Journal MIPA Education Research, 2(1), 104-115.
• Somakin. (2010). Developing Student Self-efficacy through Mathematics Learning. Sriwijaya (Online) Paradikma Journa, 3(1).
• Subandi, A. (1982). Social Psychology. Jakarta: Bulan Bintang.
• Sugiyono. (2009). Educational Research Methods: Qualitative, Quantitative, and R&D. Bandung: Alfabeta.
• Sukmadinata, N. S. (2005). Educational Research Methods. Jakarta: PPS UI dan Remaja Rosdakarya.
• Surya, E., & Rahayu, R. 2017. Improving Communication Ability and Solving Mathematical Problems of AR-Rahman Percut Middle School Students through STAD Type Cooperative Learning. Journal of Mathematics Education PARADIKMA, 7(1), 24-34.
• Thiagarajan, S. Semmel, D. S., & Semmel, M. I. (1974). Instructional Development for Training Teachers of Exceptional Children: A sourcebook. Indiana: Indiana University.
• Trianto. (2011). Mendesain Model Pembelajaran Inovatif Progresif. Konsep, Landasan, dan Implementasinya pada KTSP. Jakarta: Kencana Prenada Media Group
• Zakaria, E., & Muzakkir, S. (2017). The Effect of Realistic Mathematics Education Approach on Students’ Achievement and Attitudes towards Mathematics. Journal Mathematics Education Trends and Research, 2017(1), 32-40. https://doi.org/10.5899/2017/metr-00093

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