Stages of development electronic chemistry book on acid and base use 4S TMD models with STES approach

The purpose of this study was to development electronic chemistry book on acid and base use 4S TMD models with STES approach. 4S TMD models consist of selection, structuring, characterization, and didactic reduction. This study method is the first part of the development of teaching materials which includes selection and structuring steps. The study method is Development Research (DR) that consists of design, development, and evaluation. The design stage was to analyze and plan the types of teaching materials instructional developed. There are 13 indicators from 2 standard competencies that produced in selection step based curriculum, the compatibility subject matter and indicators, and the relations between value and subject matter. Explains the concept of acid-base using standardized textbook sources, and analyzes STES that can be integrated with the concept of acid base. In the structuring step, concept maps, macrostructures, and multiple representations are developed that connect between representations of macroscopic, submicroscopic and symbolic levels. The result of the selection and structuring steps are evaluated by expert lecturers. The first part of the development of teaching materials which includes the selection and structuring steps resulted in a draft of electronic chemistry book on acid-base with STES approach. This study reaches the structuring stage, then characterization and didactic reduction stage will be followed up.