Development of self-efficacy in high school students through soil analysis in the protected natural area "Estero El Soldado"

Teaching various scientific disciplines involves both hands-on and theoretical methods aimed at sparking students' curiosity in learning concepts. Students enhance their comprehension by actively engaging in direct activities rather than solely relying on explanations provided by teachers. The development of a research project carried out by 12th grade students during the semester allowed them to develop scientific or technological research to understand nature and act on it. The research project involved taking soil samples of natural protected area “Estero El Soldado” and analyzing it using a microscope, increasing student’s self-efficacy using the microscope. Self-efficacy was measured before and after the proposed research project using the General Self-Efficacy Scale instrument (Baessler and Schwarzer, 1996), which consists of 10 items and measures a person's perception when facing a variety of stressful situations. The participation of 43 12th grade students was analyzed. After the completion of the research project students, the results from the pre-test (M = 66.89, SD = 19.52) and post-test (M = 80.34, SD = 19.84) self-efficacy evaluation indicate that carrying out the research project resulted in an improvement in self-efficacy, t(84) = 2.01, p = 0.0008. We can conclude that integrating hands-on research projects like soil analysis using different laboratory equipment boosts 12th-grade students' scientific self-efficacy, as evidenced by improved scores on the General Self-Efficacy Scale. These findings underscore the value of experiential learning in nurturing both scientific skills and confidence in students.