Introduction: When talking about knowledge itself, the way it is perceived, understood, learnt, remembered and thought, we are talking about metacognition. It is considered a crucial aspect in the development of reflective thought, autonomous learning and construction of knowledge. There exists several tools in literature to measure metacognitive aspects, however, there is no instrument related to metacognitive strategies in the area of mathematics. The objective of this study is to design two inventories, one in general metacognitive strategies and the other, for indefinite integrals from the inventory of metacognitive awareness of adults. Method: This study is focused on the translation of metacognitive awareness of adults (MAI) to Spanish and its adaptation to the general metacognitive strategies and indefinite integrals to develop two inventories. Factor analyses were conducted using SPSS to analyze the validity and reliability of them. Results: The results support the validity and reliability made from the Metacognitive Awareness Inventory (MAI). Discussion and Conclusion: The modified versions of the MAIL, called GMSI and MISI are valid and reliable for measuring general metacognitive strategies and metacognitive strategies specific for indefinite integrals, respectively.