A METHODOLOGICAL PROPOSAL TO INCREASE THE INTEREST IN SCIENCE, TECHNOLOGY, ENGINEERING AND MATHEMATICS (STEM) IN SECONDARY EDUCATION STUDENTS - t. r. herrero tejedor; j. l. martin romero; e. perez-martin; m. r. contreras-alonso; m. n. sanz; g. cabrales goitia (Inted2019 Proceedings, 2019)