Development of Chemistry Worksheet Based Learning Inquiry for Student in Senior High School

The aim of this research is developing a model of student worksheet based learning inquiry on reaction rate that valid, practical and effective. This research is Research and Development model which refers to a 4-D development model consists of four phase, i. e.: (1) define a review set and the terms of learning starting with analysis aims of material restrictions to develop the devices, (2) design the aims that needed to prepare a learning tool prototype, (3) develop aims to review and produce learning tool that is valid, effective and practical, and (4) dissemination; in this stage is the usage of device has been developed more in a wide scale. The research subject was science-2 Student Class XI Senior High School-2 Polewali. Research results showed that (1) Student worksheet is valid based on the findings of the validation and limited testing process as well as revisions, (2) Effective, based on (a) the findings that students results meet the class completeness criteria, (b) activities Students in psychomotor and affective aspects results in very high and high category, respectively, (3) Practical responses by students and teachers against student worksheet on both categories showed good and very good category.