As a result of the crises we have experienced in recent years, there has been an unparalleled technological development that has not only affected the economic, medical and employment spheres, but also education. Science has become a dynamic and effective mechanism to circumvent the limitations of these crises, bringing education closer to those who could not attend school and as a rising value for the employability of secondary school students.

However, this technification has not reached all schools equally, and its implementation often does not reach the schools that need it most: those schools in areas particularly affected by the social emergency.

In this context, seven technology companies and secondary schools in Europe have created an innovative methodological strategy that promotes technological training and interest in science and technology for secondary school students with barriers. All this through the creation of Techlabs, technological fabrication workshops where students with barriers from segregated areas (especially women, as according to the White Paper on Women in Tech (2019), only 16% of STEM professionals are women, and very few teenage girls, 0.7%, are interested in studying technological degrees) will use state-of-the-art digital fabrication equipment (such as 3D printers) not only to acquire scientific and technological training, but also to create educational materials to help under-resourced primary schools. In this sense, through this methodological strategy, teachers will be able to include 3D in their students' education in an easy and dynamic way, and students will enter the exciting world of science, developing fundamental skills for their academic and professional future.

In this communication we show, as an example, how to use Techlab in a series of practical classes on molecular models. 3D printing will make it possible to produce a very wide range of molecular structures at very low cost. Students learn how to use a three-dimensional design programme. They then see how to manufacture it by 3D printing, produce simple molecules, appreciate the concept of molecular mobility. They make a model of a polymer chain, see how the rearrangements lead to it forming a coil, a more likely structure than that of the extended chain.. The idea is to get to see the molecules that make up the tissues of living organisms, which are mainly polymers: polysaccharides, proteins, nucleic acids. Models of the basic structures are made of all of them. Finally, they are suggested to apply what they have learned in the development of a toy that can be used in primary school classrooms.

Acknowledgements:
This work has been funded by the Erasmus + program within the Project “DIDACTECH: - 2024-1-ES01-KA220-SCH-000247893, granted in 2024 by the Spanish Service for the Internationalization of Education (SEPIE).

Keywords: School, secondary education, technology, methodology, research, students.