摘要：The purposes of this study are: (1) to know if students’ mathematical problem-solving ability taught by
contextual learning model is higher than students taught by expository learning, (2) to know if students’ selfconfidence
taught by contextual learning model is higher than students taught by expository learning, (3) to
know if there is interaction between learning model and students’ early mathematical ability to improve
students' mathematical problem-solving ability, (4) to know if there is interaction between learning model and
students’ early mathematical to improve students' self-confidence. This study is a quasi-experimental research.
The population in this study consists of 180 students in grade VIII SMP Muhammadiyah 11 Pangkalan Brandan.
Two classes (60 students) are taken as sample. Data were analyzed by two way Anova. The results of this study
indicate that (1) students’ capability of solving mathematical problems taught with contextual learning model is
higher than students taught by expository, (2) students’ self-confidence taught by contextual learning model is
higher than students taught by expository, (3) there is interaction between learning model and students’ early
mathematical ability to improve students' mathematical problem-solving ability, (4) there is interaction between
learning model and students’ early mathematical to improve students' self-confidence.
