51 score each qustion in each student. Then the score each question in
each student is summed. 3. Guidelines of calculating the successful action
Based on the observation results and the Creative Thinking Ability post-test. The successful action on this research calculating use the
formula by Purwanto 2013: 102 with modification: N =
+ X 100
Description: N
: successful action of mark R1
: total score from observation results R2
: total score from post-test results SM1
: maximum score ideal from observation SM2
: maximum score ideal from post-test 100
: fixed number
I. Criteria of Successful Action
The learning process can have a good quality if exceeded a predetermined success criteria. Mulyasa 2006: 209 explained the quality
of learning and formation of competence can be seen in terms of process and results. In terms of process, learning or formation of competence is
successful and have a good quality if in whole or at least 75 of students are active, whether physical, mental, and social in learning process. In
terms of results, the learning process is successful if there is a positive change in behavior of students at least 75.
The successful action in this research is calculated from observation result and the Creative Thinking Ability post-test. The criteria
52 of successful action in this research by implementation Problem Based
Learning Model to improve Creative Thinking Ability of students class XI Accounting 2 in taxation subject at SMK Negeri 1 Yogyakarta academic
year 20162017 if 75 of students able to achieve the mark of successful action at least 75.
53
CHAPTER IV RESEARCH RESULT DISCUSSION
A. Description of Research Place
SMK Negeri 1 Yogyakarta is a vocational high school located at Jl. Kemetiran Kidul 35, Pringgokusuman, Gedong Tengen, Yogyakarta. SMK
Negeri 1 Yogyakarta consists of three competency skills, there are accounting competency skill, marketing competency skill, and office
administration competency skill. Each competency skills consist of class X, XI, and XII. SMK Negeri 1 Yogyakarta has a vision that produces
graduates who can compete in the global era, devoted, and cultured. While the mission of SMK Negeri 1 Yogyakarta is as follows:
1. Implement management school based on ISO 9001: 2008. 2. Implement and developing curriculum SMK Negeri 1 Yogyakarta with
reference to the school’s profile international standard. 3. Improving the competence of competitive human resource.
4. Invest cultural values, belief, and piety in school activities. Table 9. The Competency Skill in SMK Negeri 1 Yogyakarta Academic
Year 20162017 No.
Competency Skill Amount of Class
1 Accounting
6 2
Marketing 6
3 Office Administration
6
Class XI Accounting 2 at SMK Negeri 1 Yogyakarta academic year 20162017 is one of the classes of the accounting competency skill, with
32 students. Class XI Accounting 2 learns taxation subject once a week,
54 for two hours on Tuesday of the second and third lesson. In the learning
process, the students made a presentation and followed by a qustion and answer as their primary source of learning in taxation subject.
B. Description of Action Research
Classroom Action Research CAR using Problem Based Learning Model held for two cycles. Each cycle consist of one meeting and each
cycle is held pre-test and post-test. In this research, researcher acted as a teacher in the classroom and assisted by three observers were tasked to
observe the learning process on taxation subject in implementation of Problem Based Learning Model. Implementation in the cycle I and cycle II
can be described as follows:
1. Cycle I
The learning process of taxation subject in class XI Accounting 2 at SMK Negeri 1 Yogyakarta using Problem Based Learning Model
cycle I was conducted on Tuesday, November 8, 2016. Cycle I was done in one meeting. The meeting lasted 2 x 45 minutes. The learning
material in the cycle I is income tax article 2126. The stages are as follows:
a. Planning Stage
Before action research, the researcher makes planning first so the learning process takes place smoothly. The planning as follows:
