Effectiveness of Lesson Exemplars on Combinatorics Using Cognitive Guided Instruction for Grade 10 Students

The main purpose of this study was to determine the effectiveness of lesson exemplars on combinatorics using Cognitive Guided Instruction for Grade 10 students at Gate National High School with the topics Permutation and Combination. It developed lesson exemplars using cognitive guided instruction in teaching combinatorics. Moreover, it also included the validity of the lesson exemplars as evaluated by experts along lesson planning features and learning activities features, the mastery level of the students in the pre-test and post-test along the 2 topics and finally the effectiveness of lesson exemplars on permutation and combination using CGI. The descriptive methods of research were used in this study. The researcher used a sample size of 22 using a purposive sampling. The main instrument of this study is the lesson exemplars on combinatorics using Cognitively Guided Instruction, pre-test and post-test results and the validation sheets prepared by the researcher. Survey and test administration was used to gather the needed data. The results were tallied, tabulated and textually interpreted using appropriate statistical tools such as: weighted mean, percentage and T-test. Findings revealed that 1. Lesson exemplars on combinatorics using Cognitive Guided Instruction focuses on student learning wherein students are guided by the teacher through asking questions which leads to the correct answer. It is also a student centered and allows the students to connect their prior knowledge with the new ideas gained from the lesson exemplar on permutation and combination. The teacher will probe the answers of the students. It also lets the students discover the correct answer through the guided questions of the teacher.2. The overall weighted mean of the lesson exemplars using CGI in permutation and combination along lesson planning features are 4.6 and 4.68, respectively, both interpreted as excellent.3. The overall weighted mean of the lesson exemplars using CGI in perm