Improving Students Higher Order Thinking Skills Trough Implementing Open Inquiry-KWHL Chart

The idea of ??this teaching innovation through classroom action research is aimed to exploring how the implementation of Open Inquiry-KWHL Chart learning model can improve students' high-order thinking skills. This is evidenced by the posttest result of high-order thinking skills, adapted from the international standard test of Cambridge Curriculum, and from the inquiry's observation sheet. Improvement of learning outcomes is seen in the mastery learning of students. If the initial study the mastery learning reached only 22.86%, then the first cycle increased to 54.29%, then in the second cycle mastery learning reached 77.14%. Activities and scientific attitudes of students in cycle II increased, in the first cycle of inquiry aspects have not observed optimally, but very developed in cycle II. This is considered by the Open Inquiry learning model are able to challenge students to reasoning more with their personal experiment, with KWHL Chart as a classroom management framework. The enthusiasm of students to engage in groups can also scaffolding their thinking process in investigations.