Given the great evolution and transformation of digital technologies and their penetration in different aspects of daily life, there is a need to provide equal possibilities and equal rights to access them, which implies training digital citizens. On the other hand, digital technology and some methods of social sciences and computer science to visualize data, support what is known as digital humanities. These add computational thinking and create new kinds of jobs, skills and specific knowledge. Currently there are several efforts to add their teaching at the higher level, however, there is little evidence of their presence at the high school level. With the aim of promoting the formation of digital citizens by considering aspects of computational thinking through data visualization in digital humanities, this paper first analyzes articles that consider the teaching of digital humanities in order to know the visualization methods applied. A platform to make educational activities considering some of the surveyed methods is presented, a case study considering a curricular design is proposed and a proof of concepts from the above is performed. The results of the survey analysis show, on the one hand, the use of certain data visualization methods in the teaching of digital humanities at high school level, on the other hand, the feasibility of using the proposed platform for the defined case study and the viability to develop digital skills and computational thinking in students. This is considered a contribution to the empowerment of digital citizens from the high school level.