This study aimed to determine the feasibility of the booklet from the inventory of macroscopic fungi in the Pikul Customary Forest of Bengkayang Regency as a teaching medium on mushroom material.The research method used is descriptive with quantitative research form.The booklet in this study resembles a book in that there is an introduction, content and closure.Booklet validation was carried out by 5 validators consisting of 2 lecturers of Biology Education, Faculty of Teacher Training and Education, Tanjugpura University and 3 Biology teachers in class X SMA.The results of booklet validation were analyzed using Lawshe by calculating the Content Validity Ratio (CVR) and the Content Validity Index (CVI).The CVR and CVI results from 5 validators obtained a value of 0.99 so that the booklet was declared valid as a learning medium on the material of mushroom class X SMA.
                        
                        
                        
                        
                            
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