The challenges of virtual learning in times of COVID-19 were analyzed at the Faculty of Education of Secondary Education of the “Félix Varela Morales” Pedagogical Headquarters, of the “Marta Abreu” de Las Villas Central University, located in the city of Santa Clara, Villa Clara Cuba between the years 2020-2021. The Materialist Dialectic was used as a general method, and the methods of the historical-logical, analytical-synthetic, and inductive-deductive theoretical level. Bibliographic sources were reviewed including journal articles, books, research reports, and documents that deal with the subject mainly between the years 2020-2021. Among the main results, the need to work in the direction of threegreat challenges stands out: the efficient use of technological resources available in Cuban universities, the preparation of teachers and students for virtual learning, and the did...

The research carried out consisted of the design, elaboration and proposal of a system of workshops with the objective of contributing to the knowledge about Invasive Exotic Species (IES) of plants, by school children of the Rural Basic Secondary School "Wilmina Vizcaino Sarduy" located in the town of Manajanabo, in the municipality of Santa Clara, province of Villa Clara, in the Republic of Cuba. For the development of the research, different methods of information gathering and processing were used in their dialectic interrelation, which allowed verification of the existing deficiencies regarding the knowledge of plant species considered to be IES and their undesirable effects on the vulnerable Cuban ecosystems, considering that there are 8 species of invasive exotic plants in the area. The system of workshops was proposed from the school's educational project. The proposal was evaluat...