Pengembangan Lkpd Berbasis “Problem Solving” Untuk Meningkatkan Kemampuan Berpikir Kritis Pada Materi Dinamika Kependudukan Di Indonesia

Development of Lkpd Based on "Problem Solving" to Improve Critical Thinking Ability on Population Dynamics in Indonesia

Dalam proses pembelajaran guru menggunakan bahan ajar yang sangat beraneka ragam.  Salah satu contoh bahan ajar yang guru gunakan dalam proses belajar mengajar adalah Lembar Kerja Peserta Didik (LKPD). Kebanyakan guru di sekolah masih menggunakan LKPD dari penerbit, atau LKPD yang dibuat oleh tim MGMP tapi masih belum memenuhi tuntutan kurikulum yang terbaru Abad 21.Penelitian ini bertujuan untuk mengetahui kelayakan, kepraktikan dan keefektifan LKPD berbasis “Problem Solving” untuk meningkatkan kemampuan berpikir kritis. Penelitian ini, penelitian Kuantitatif dengan jenis penelitian pengembangan (development research) yang mengacu pada metode penelitian  Research and Development (R & D). Desain uji coba LKPD menggunakan One group pre test postets” pada desain ini terdapat pretest – post-test design, terdapat pretest sebelum diberi perlakuan, dan hasil perlakuan dapat diketahui dengan lebih akurat, karena dapat membandingkan dengan keadaan sebelumnya.

Hasil pembahasan menunjukkan bahwa Tingkat kevalidan LKPD berdasakan hasil validasi para validator membuktikan LKPD berbasis “Problem Solving” berada dalam rentang  3,3 – 4,0 dengan kategori sangat valid dan valid. Tingkat kepraktisan LKDP diukur dari hasil pengamatan keterlaksanaan pembelajaran dan respon peserta didik menunjukkan persentase keterlaksanaan pembelajaran setiap aspek dalam RPP pertemuan I dan II sebesar  73% - 100%. Tingkat keefektifan LKPD diukur dari hasil analisis ketrampilan berpikir kritis peserta didik dan pengusaan konsep peserta didik, berdasarkan hasil uji t berpasangan terhadap kemampuan berpikir kritis peserta didik menunjukkan bahwa sig 0,000 < 0,05 maka H0 ditolak dan Ha diterima yang menunjukkan bahwa terdapat  perbedaan antara pretest dan postest. Pada tabel Paired Sample Test juga memuat informasi tentang “Mean Paired Differences adalah sebesar -13,5833, nilai ini menunjukkan selisih rata-rata hasil belajar pre test dan post test dan selisih perbedaan -5, 828 (95% Confidence Interval Of the Difference Lower dan Upper). Terdapatnya perbedaan antara hasil nilai pretest dan post test yang menunjukkan bahwa LKPD dapat meningkatkan kemampuan berpikir kritis.

Kata Kunci : LKPD, Kelayakan, Kepraktisan, Keefektifan 

The teacher learning process uses a very wide variety of teaching materials. One example of teaching materials that teachers use in the teaching and learning process is the Student Worksheet (LKPD). Most teachers in schools still use the LKPD from the publisher, or LKPD created by the MGMP team but still do not meet the requirements of the latest 21st century curriculum.This study aims to see the feasibility, practice and effectiveness of LKPD based on "problem solving" to improve critical thinking skills. This research, quantitative research with the type of development research (development research) which refers to the research method Research and Development (R & D). The LKPD trial design uses One group pre test postets "in this design there is a pretest - post-test design, there is a pretest before being given treatment, and the results of treatment can be known more accurately, because it can compare with the previous situation.

The results of the discussion show that the level of validity of the LKPD based on the validation results of the validators to prove the LKPD based on "Problem Solving" is in the range of 3.3 - 4.0 with the very valid and valid category. The practicality level of LKDP is measured from the results of observations of the implementation of learning and students show the proportion of the implementation of learning for each aspect in the lesson plans I and II meetings of 73% - 100%. The level of effectiveness of the LKPD as measured by the analysis of students' critical thinking skills and students' mastery of concepts, based on the paired test results of students' critical thinking skills shows that sig 0.000 <0.05 then H0 is rejected and Ha is accepted which indicates that there is and postest. The Paired Sample Test table also contains information about "Mean Paired Differences is -13.5833, this value indicates the difference in the average pre-test and post-test learning outcomes and the difference between -5.828 (95% Confidence Interval Of the Difference Lower) and Up). There is a difference between the results of the pretest and posttest scores which indicate that LKPD can improve critical thinking skills.

Keywords: LKPD, Feasibility, Practicality, Effectiveness