The effect of project based learning and authentic assessment on students' natural science learning outcome by controlling critical thinking skill

This experimental research aims at discovering the effect of project based learning and authentic assessment on natural science learning outcome by controlling critical thinking skill. This research was done on eighth grade students in Amlapura City with 2x2 factorial design. The data of learning result and critical thinking skill were collected by using test. The obtained data were analyzed by using two ways Analysis of Covariance. The result of this research discovers that by controlling critical thinking skill, both project based learning and authentic assessment have positive effect on students' learning outcome. In addition, there is an interactional effect of instructional model and assessment type on students' natural science learning outcome. Project based learning is more appropriate to authentic assessment; meanwhile conventional model is more appropriate to conventional assessment. Based on those findings, it is recommended to implement project based learning by considering the assessment typed used.