Penelitian ini bertujuan untuk menghasilkan e-modul berbasis Predict-Observe-Explain (POE) yang layak dalam meningkatkan keterampilan berpikir kritis pada materi kesetimbangan kimia. Penelitian pengembangan ini menggunakan model 4D yang hanya dibatasi hingga tahap develop. Sasaran penelitian berupa e-modul yang diujicobakan kepada peserta didik kelas XI F-10 SMA Negeri 4 Surabaya. Data penelitian ini diperoleh dari hasil telaah, validasi, observasi aktivitas peserta didik, hasil pretest posttest keterampilan berpikir kritis dan pengetahuan, serta angket respon peserta didik setelah kegiatan pembelajaran menggunakan e-modul. Hasil penelitian menunjukkan bahwa e-modul yang telah dikembangkan dan dinilai validator berada pada kategori sangat valid dengan rata-rata median 4, respon peserta didik terhadap e-modul memperoleh persentase sebesar 99,2%, aktivitas peserta didik dengan persentase 94,6% aktivitas relevan, dan 5,4% aktivitas tidak relevan, serta tingkat keefektifan dari peningkatan keterampilan berpikir kritis berdasarkan uji Paired Sample t-Test memiliki p-value sebesar 0,000, sehingga dinyatakan e-modul layak digunakan untuk meningkatkan keterampilan berpikir kritis pada materi kesetimbangan kimia.

Kata Kunci: E-Modul, Predict-Observe-Explain (POE), Keterampilan Berpikir Kritis,  Kesetimbangan Kimia

This research aims to produce a Predict-Observe-Explain (POE) based e-module that is feasible to improve critical thinking skills on chemical equilibrium. This development research uses the 4D model, which is limited to the development stage. The research target were e-modules tested on students in class XI F-10 Senior High School 4 Surabaya. The data of this study were obtained from the results of the review, validation, observation of students' activities, pretest-posttest results of critical thinking skills, knowledge, and questionnaire responses of students after learning activities using e-modules. The results showed that the e-module that had been developed and assessed by the validator was in the very valid category with a median average of 4, the student's response to the e-module obtained a percentage of 99.2%, the students' activities with a percentage of 94.6% relevant activities, and 5.4% irrelevant activities, and the level of effectiveness of improving critical thinking skills based on the Paired Sample t-Test had a P-Value of 0.000, so it was stated that the e-module was feasible to use to improve critical thinking skills on chemical equilibrium material.

Keywords: E-Modules, Predict-Observe-Explain (POE), Critical Thinking Skills, Chemical Equilibrium.