摘要：This study aimed to improve of mathematical communication, mathematical
connection and analyze mathematical dispositions of students by using the CORE
(Connecting-Organizing-Reflecting-Extending) learning model. The study applied
a mixed method with embedded design. The subject were 82 X grade students of
high school in Sukabumi, West Java, Indonesia. It divided into 42 students for the
experimental group and 40 students for the control group. The research data were
obtained through well-structured tests of mathematical communication and
mathematical connection, mathematical disposition questionnaires, observation
sheets, and interviews. Data analysis used t-test, correlation test, descriptive
statistic and qualitative. The results indicated that; 1) the CORE learning model
can improve students' mathematical communication and connection skills, 2) the
mathematical communication for topic I=76.46; topic II=70.98; topic III=72.87;
post-test=74.26; and the mathematical connection for topic I=80.07; topic
II=79.98; topic III=75.78; post-test=80.27; 3) mathematical communication and
connections of students who learned with the CORE model was better than those
used expository learning, 4) mathematical dispositions of students who learned
with the CORE model was higher than those used expository learning as well and
5) there were correlation among mathematical communication, mathematical
connection and mathematical dispositions.
