an investigation whose purpose is to explore
problems to conclusions that integrate all available
information and therefore can be convincingly
justified.
In line with the Kurfis, (Jackson, 2015) also
argues that critical thinking can analyze the facts
then make some ideas and maintain the idea then
make comparisons. By making several comparisons
we can draw conclusions and make a solution to the
problem. (Halpern, 2014) explains that Critical
thinking is sometimes taught as a specific skill
through classroom instruction.
Critical thinking examines assumptions, discerns
hidden values, evaluates evidence and assesses
conclusions (Education and 2004, n.d.). (Warnick
and Inch, 1994) explains that critical thinking as the
ability to explore a problem, question, or situation;
to integrate information about the issue under review
and arrive at a solution to justify one 's position. In
addition, according to (Moore, 2013) critical
thinking is a form of rationality, with acquiring
students a more relative, provisional view of
knowledge and critiquing material on the basis of
such knowledge. It relates to making judgments
based on a practical and specialized knowledge that
is linked to reliability, truthfulness, and usefulness
(Moore, 2013).
3 METHODS
This research is a Class Action Research (CAR).
The research subjects used in this study were 2016
GG offering students of the economics faculty of the
poor state university majoring in Management
Accounting courses. Classroom Action Research
uses three cycles in which each cycle consists of
four meetings conducted in one semester. Action
research model The class used in this study is a
model of (Altrichter, Kemmis, McTaggart, and
Zuber-Skerritt, 2002) where each cycle consists of
four stages, namely planning, implementing,
observing, and reflecting (Arikunto, 2015: 41).
Figures 1: Classroom Action Research Model “Kemmis
and Mc. Taggart
The data used in this classroom action research
was obtained from management accounting lecturers
and students who were taking management
accounting courses. Data collection techniques used
include interviews, observation, and also
documentation. Data analysis used a qualitative
approach is data reduction, data display, and data
verification.
4 FINDINGS AND DISCUSSION
Classroom action research that had been conducted
consists of three cycles, where each cycle consists of
planning, implementing, observing and reflecting.
The first thing done in the first cycle is choosing the
right method used in the classroom to improve
students' critical thinking skills. In the other side, the
lecturers have to prepare teaching needs such as
lecture units, observation sheets, and tools for
documenting this class action research. The initial
activities carried out in this case are apperception,
the core activities are the implementation of
problem-based learning, and the closing activities
are lecturers evaluation of the student discussion
results in problem-based learning. During the
observation phase, every behavior that showed by
the students will be explained especially how their
attitude in expressing critical opinions. In the
reflection stage, the discussion group should spread
so that more critical students can share with students
who tend to be passive. The opportunity to answer
the discussion questions is given more to the passive
group so that the passive and less critical groups are
expected to be more comfortable to express their
opinions with critical thinking. This statement in line
with (Natale and Ricci, 2006) that critical thinking
within teams will improve organizational
performance. Based on the observations, cases or
problems given at the time of the implementation of
problem-based learning by lecturers tend to be
simple, so the students can not express their critical
thinking maximally. Based on the first cycle, it is
necessary to do the second cycle to improve the
management of learning that occurs in the first
cycle.
After being implemented in the first cycle for
four meetings and found to be unsatisfactory, the
lecturer conducted the second cycle. The second
cycle is the same with the first cycle where the
stages are planning, observation, and reflecting
phase. At the planning stage, the lecturer guides the
students to form groups randomly so that all students
can express their critical thoughts. Because if they