Teaching Material Development with Challenge Based Learning (CBL) Basis to Improve Critical Thinking Ability on Human Reproduction System Material of Class XI IPA 4 Students at MAN Pinrang

The study aims at (1) developing teaching material based on Challenge Based Learning (CBL) basis in Human Reproduction System material, (2) Obtaining data of validity and effectiveness of teaching material with CBL basis on Reproduction System material, and (3) describing students critical thinking ability improvement after teaching by using teaching material based on CBL. The study is research and development. The study was conducted at MAN Pinrang in March 2016 to June 2016. The subject of the study was the students of class XII IPA 4 at MAN Pinrang of academic year 2015/2016 which consisted of 38 students. The development design referred to 4D development model by Thiagarajan consist of 4 stages, namely defining, design, development, dissemination with the teaching product in forms of student`s book with CBL basis and student`s work sheet with CBL basis. The result of the study reveal that (1) the teaching material with CBL basis developed has met valid criteria with the total mean score for all assessment indicators V=100%. The validity of teaching material is stated at the level of strong relevancy with content validity coefficient more than 0.75 or V>75% from the ideal score 100%, (2) the teaching material with CBL basis has met effective criteria based on the result of students` response on students` book with the mean of positive response is 97.37% and the response on the student`s work sheet with the mean of positive response is 91.58%; (3) the critical thinking ability of grade XI IPA 4 students at MAN Pinrang after being taught by employing teaching material with CBL basis has improved by 18.34 with the mean score 61.06 in cycle I and 75.39 in cycle II.Keywords: Challenge Based Learning, Critical Thinking Ability