Designing a differential calculus textbook for mathematical guided inquiry Available to Purchase

This study aimed to develop a high-quality textbook for Differential Calculus and evaluate its effectiveness. The textbook was designed to support students learning using guided inquiry and to improve their mathematics thinking ability. The indicators of the high-quality textbook referred to three criteria offered by Nieveen: validity, practicality and effectiveness. The stages of development referred to the Four-D model by Thiagrajan, Semmel & Semmel. A field trial for the textbook was carried out and 23 students of an undergraduate educational school became subjects for the trial. The study results show that the developed textbook is valid to be used as a learning resource for differential calculus. The result shows that the developed textbook is valid due to expert validation and the readibility criteria also are met. The practicality aspect of the book development shows that the textbook can be used in differential calculus classroom with a guided inquiry approach. The development of the textbook is, however, just a starting point for creating a proper learning environment for students to learn using guided inquiry approach. In addition, the outcome of this research should be extended by further development of an accurate assessment method to evaluate the skill of students after using the textbook in the guided inquiry classroom.