Pengembangan e-LKPD Berbasis Project Based Learning Berbantuan Laboratorium Virtual  untuk Melatih Keterampilan Berpikir Kritis Peserta Didik Pada Sub Materi Faktor-Faktor yang Mempengaruhi Laju Reaksi

Development Of Electronic Worksheets Based On Project Based Learning Assisted By A Virtual Laboratory To Train Students' Critical Thinking Skills In Sub-Material Factors That Affecting Rate Of Reaction

Penelitian ini bertujuan untuk mendeskripsikan kevalidan, kepraktisan, dan keefektifan e-LKPD berbasis Project Based Learning berbantuan laboratorium virtual untuk melatihkan keterampilan berpikir kritis peserta didik pada sub materi faktor-faktor yang mempengaruhi laju reaksi. Peneitian ini adalah penelitian dan pengembangan dengan jenis penelitian Research and Development (R&D)  dengan model pengembangan 4D (Define, Design, Develop, Dessiminate) yang dibatasi hanya sampai tahap develop. Uji coba produk dilakukan pada 30 peserta didik kelas XI SMA Negeri 1 Cerme. Hasil penelitian ini menunjukkan bahwa validasi e-LKPD pada validitas isi maupun validitas konstruk memperoleh skor dengan modus 5 untuk keempat e-LKPD  sehingga e-LKPD yang dikembangkan dikategorikan sangat valid. Untuk uji kepraktisan e-LKPD ditinjau dari hasil observasi aktivitas peserta didik diperoleh hasil aktivitas yang relevan pada pertemuan 1 sebesar 93,89%, pada pertemuan 2 sebesar 94,44%, pada pertemuan 3 sebesar 92,22%, dan pada pertemuan 4 sebesar 93,33% serta ditinjau dari hasil angket respon peserta didik diperoleh persentase rata-rata sebesar 93,5% % sehingga e-LKPD yang dikembangkan dikategorikan sangat praktis. Untuk uji keefektifan e-LKPD ditinjau dari hasil pretest dan posttest diperoleh ketuntasan klasikal saat pretest sebesar 0% meningkat menjadi 83,33 % saat posttest, dari uji Wilcoxon diperoleh nilai asymp.Sig < 0,05, maka dapat disimpulkan ada perbedaan peningkatan keterampilan berpikir kritis peserta didik sesudah pembelajaran menggunakan e-LKPD yang dikembangkan, serta perolehan N-gain score dalam kategori sedang dan tinggi sehingga e-LKPD yang dikembangkan memenuhi kriteria keefektifan.

Kata Kunci : e- LKPD, project based learning, laboratorium virtual, keterampilan berpikir kritis, laju reaksi

This research aims to describe the validity, practicality, and effectiveness of e-LKPD based on Project Based Learning assisted by a virtual laboratory to train students' critical thinking skills on the sub-material of factors that affect the reaction rate. This research is research and development with the type of Research and Development (R&D) research with the 4D development model (Define, Design, Develop, Dessiminate) which is limited only to the develop stage. The product trial was conducted on 30 students of class XI SMA Negeri 1 Cerme. The results of this study indicate that the validation of e-LKPD on content validity and construct validity obtained a score with a mode of 5 for the four e-LKPD so that the e-LKPD developed was categorized as very valid. For the practicality test of e-LKPD in terms of the results of student activity observations, the results of relevant activities at meeting 1 were 93.89%, at meeting 2 were 94.44%, at meeting 3 were 92.22%, and at meeting 4 were 93.33% and in terms of the results of the student response questionnaire obtained an average percentage of 93.5% % so that the e-LKPD developed was categorized as very practical. To test the effectiveness of e-LKPD in terms of the results of the pretest and posttest, it was obtained that the classical completeness during the pretest was 0% which increased to 83.33% during the posttest, from the Wilcoxon test obtained an asymp.Sig value <0.05, it can be concluded that there is a difference in the improvement of students' critical thinking skills after learning using the developed e-LKPD, as well as the acquisition of N-gain score in the medium and high categories so that the developed e-LKPD meets the effectiveness criteria.

Keywords : e- LKPD, project based learning, virtual laboratory, critical thinking skills, reaction rate