| dc.description.abstract | Critical thinking has a very important role in
constructing the improvement of students' ability to face
the 21st century, especially in generalizing the pattern of
the two dimensional arithmetic series. Since critical
thinking is necessary when we try to understand and
process information, put forward ideas or ideas
objectively, and develop deeper insights. The purpose of
this study is to analyse students' critical thinking skills
based on P21. This study is a combination method in
which this method is a combination of quantitative and
qualitative methods. Research subjects are high school
students. This subject is expected to provide an overview
of critical thinking based on P21. Data collection
techniques in this study are: (1) test, this technique is
used to measure the ability of students in mastering the
arithmetic array of two dimensions; (2) interview; it is
based on the students work in solving the problem of two
dimensional arithmetic series. The data result showed
that in the experimental class had increased 40.85% on
the indicator of effective reasoning, 37,44% on indicator
of thinking system, 47,53% on decision indicator, and
42,55% on problem solving indicator. While the control
class experienced a 19.5% increase in the effective
reasoning indicator, 0.07% on the indicator of the
thinking system, 0.02% on the decision making indicator,
and 0.02% on the problem solving indicator. | en_US |
