Developing Learning Model Based on the PMR Approach to Improve Student's Knowledge in Mathemathics Learning

There are several factors that cause the low achievement of students' mathematics learning outcomes in several high schools in the Dharmasraya district, including: learning process plans (RPP), monotonous methods, only 15% of students who like mathematics, abstract material, lack of media, teacher's difficulty in analogizing material into life around students or vice versa. This is a Research and Development that uses the Plomp development model, which consists of three phase the Preliminary, Prototype, and Assessment. Based on the results of this research that the learning design topic Implementation of sequences and series based on PMR approach has; The average value of HLT validity is 4.11 with a very valid category. The practical test of learning books applying PMR-based sequences and series by teachers and students is 85.02 and is classified as very practical. The average value of students' mathematical reasoning ability tests after being tested is 76.97% and can be categorized as effective and it also can improve student's knowledge in mathematics learning.