Validity of integrated science textbook with the theme of meteor fall using immersed model based on IDEAL problem solving

Abstract

The validity of textbooks is important to gain recognition of the textbook's suitability to the needs. The aim of this research is to produce a valid integrated science textbook with the theme of meteor fall using immersed model based on IDEAL problem solving for junior high school. The method used in this research is descriptive statistics. The textbook's validity was assessed by three experts and three practitioners using a validation sheet. The validity textbook was analysed by using Aiken's V formula. The analysis of data shows the results of the expert validity with an average of 0.90 and validation of practitioners with an average of 0.82. These findings indicate that integrated science textbook meteor fall theme using immersed model based on IDEAL problem solving by experts and practitioners are in a valid category. Overall, this integrated science textbook with the theme of meteor fall using immersed model based on IDEAL problem solving declared eligible to be used in learning.