The study was aimed at finding out the suitability of Biology Materials using the metacognitive stratedy.The materials were textbooks self-understanding Evalution Sheet and the key lesson plan and tests including the answer key.The criteria of appropriateness included the relevance of he resources with the content validity face validity and the languange.This research and develompent study was carried out employing a 3D model namely define design and develop.At the define stage three topics were selected for analysis they were virus Endocrine System and Genetic material.During the design phase the physical appearance of the materials was suited with the Metacognitive Strategy.At the develop phase the material resources were examined and validated by two Biology experts and senior techers of Biology.The results showed that biology material Resources using Metacognitive Strategy developed in the study has fell into the category of very good (score gt 3.31) and was therefore considered suitable.