EFEKTIVITAS MODUL LARUTAN ELEKTROLIT DAN NONELEKTROLIT BERBASIS DISCOVERY LEARNING TERHADAP KETERAMPILAN BERPIKIR KRITIS DAN HASIL BELAJAR SISWA KELAS X MIPA SMAN 2 BUKITTINGGI
Electrolyte and nonelectrolyte based discovery modules are available learning is valid and practical, but has not been tested its effectiveness. Therefore the study aims to reveal the effectiveness of electrolyte and nonelectrolyte solution modules on students' learning outcomes and critical thinking skills. The module effectiveness test is done through quasi experimental research with Pretest-Posttest Control Group Design design. Research population of all students of class X MIPA SMAN 2 Bukittinggi. The sample was taken by purposive random cluster sampling technique.. The research instrument used in the form of learning result test and critical thinking skill assessment sheet. Techniques of data analysis of learning outcomes by using SPSS 16 software and critical thinking skills with percentage techniques. Based on the result of the research, it is found that the experimental class N-gain (0.76) is higher than control class (0.67). The data analysis technique showed that the experimental and control classes were normally distributed and had homogeneous variance, so the t-test was performed. From the result of t-test analysis obtained (sig) 0.006 <0.05 which indicates that experiment class learning outcomes are significantly higher than control class. Based on the data analysis of students critical thinking skills, the average score of students' critical thinking skills is 87%. The research findings show that the use of electrolyte and nonelectrolyte based discovery modules learning effective on student learning outcomes and critical thinking skills at SMAN 2 Bukittinggi