The Development of RBL – STEM Learning Materials to Improve Student’s Conjecturing Thinking Skills in Solving Rainbow Vertex Antimagic Coloring Promblems and it’s Application to Supply Chain Management Using ANN

One of the educational developments in recent years has to do with STEM. The term STEM (Science, Technology, Engineering, and mathematics) is one approach learning process that quite influential be used today. STEM-based focuses students on solving problems everyday life by combining four fields science: science, technology, engineering, mathematics. resulting device met validity criterion 3.25≤ Va<4; suggestion from validators does not change as a whole, but only tiny part. score obtained each 3.6 for RTM (valid), 3.5 LKM (practical), THB (practical). This math tool also meets criteria practicality, practitioner’s advice whole In addition being valid practical, effectiveness. average student this trial class classified complete student, response positive. Based test results, researchers found 16 70% presentations who scored above 60.