The purpose of this research is to develop
mathematics learning devices in the form of Lesson Plan (RPP)
and Student Assignment (LKPD) based Realistic Mathematics
Education(RME) on probability materials in line with curriculum
2013. In addition, this research aims to describe the quality of
developed learning devices in both validity and practicality
aspects. This is a development research with 4D model including
define, design, develop and disseminate. The researcher modified
the development model by simplified the model through limit the
research up to develop stage by considering the time and the
cost. The define stage consists of: a) curriculum analysis; b)
student analysis; and c) concept analysis. The design stage
consists of: a) Lesson Plan design; b) Student Assignment
design; c) instrument design and validation on assessment
instrument of learning devices. Meanwhile, the develop stage
consists of: a) the validation of learning devices by the expert
and mathematics teacher; b) testing; and c) the questionnaire of
both teacher and students responses. This research produces
mathematics learning devices in the form of Lesson Plan and
Student Assignment basedRealistic Mathematics Education
(RME) on Probability materials class X. The research findings
shows that according to expert and mathematics teacher
assessment, the developed learning devices are valid with 3.25
on average for lesson plan and 3.48 on average for student
assignment. The result of the teacher response on the
questionnaire shows that student response and interview display
that mathematics learning devices in the form of lesson plan and
student assignment are practical to be used on mathematics
learning particularly on probability materials with 3.50 on
average for Lesson Plan and 3.30 on average for Student
Assignment.
Keywords: Realistic Mathematics Education (RME), mathematics learning devices, probability