Textbook Design on Temperature and Thermodynamic Based on Problem Solving Blended Learning Model

Abstract

Abstract Research has been conducted to determine the validity of the development of textbook based on problem solving-blended learning model. The development method used in this research is refer to the 4D development step of Tiagarajan modified. Validation is conducted by 5 people, they are through the validation expert and appropriate field of study. Validation data was obtained by using a sheet validation then analysed by descriptive qualitative method. There are six components of validated used to validate the textbook, including: 1) design; 2) format; 3) materials (content); 4) language; 5) presentation; and 6) the innovation and quality of learning. The result of validity of textbook based on problem solving-blended learning model is 3.3 with a valid criteria. Therefore, the textbook developed are valid and appropriate to use.