The teaching of descriptive writing : a comparative study of mind mapping and parallel writing model, is a book containing 5 parts develop from a research conducted at IAIN Ambon particularly Math students, who registered at academic year 2017-2018. This research was motivated by a desire to find a learning model of writing taught to non-English department students. Writing is an English language skill which is considered difficult for students at math department. Choosing the right writing learning model will help students write English correctly. The results of the study in this book explain that, mind mapping model makes students write descriptive text well compared to parallel writing. For this reason, mind mapping model can be used in writing instruction. The procedures are explained detail.