This research was conducted to determine the effect of yeast concentration and combination of lamtoro gung (Leucaena leucocephala (Lamk.) De Wit) seeds with gude beans (Cajanus cajan (L.) Millsp.) On protein content and tempe fiber as a design of the Student Worksheet (LKPD) in conventional Biotechnology coventioanl material in Class XII High School in April-November 2019. This research was car…