According to [23], reading should not be described simply as an activity but as a tool enabling academic formation. Through reading, individuals can promote intellectual abilities, understand and contrast information, actively participate, provide clear responses, facilitate expression, learn and use new vocabulary, provide solid opinions, and imagine and create [24].

Reading requires understanding the ideas presented in the text, relating them to what the reader already knows, drawing conclusions, and using this information according to the stated purpose of the text, whether it be to investigate, study, collect data, or entertain. Teaching this process is essential, as the lack of guidance may be one reason students obtain low scores on reading comprehension tests [25].

As stated by [26], it is essential to prioritize fundamental learning methods that can be enhanced through active approaches, such as project-based learning, problem-solving, and questioning, to improve students’ competencies, such as the ability to create, imagine, and solve problems, as well as the development of skills in oral communication, reading comprehension, writing, and mathematical calculation. Ref. [27], also refers to the effectiveness of using diverse, active methodologies in the educational field.

According to [28], a study previously conducted by the National Institute of Statistics and Census (INEC) showed that 26.5% of Ecuadorians do not have the habit of reading, and the reasons mentioned include lack of interest, not necessary, lack of time, difficulties in concentration, among others. Regarding reading time, 50.3% read books for 1 to 2 h and 13.5% for 3 to 4 h per week. By age groups, young people aged 16 to 24 read more books at 83%, while those over 65 read less, which represents 62%. It should be noted that 33% of respondents mentioned that they must fulfill academic obligations, while a lower percentage do so to learn more about a specific topic.

Worldwide reading rates reveal that, in general, there are countries where reading ability is promoted since limited reading is an obstacle to the progress of society. Ecuador is no exception. The statistics are clearly below the indicators of other countries.

The habit of reading in English among primary school students is a critical factor for their academic and linguistic development. Reading in English allows them to develop their vocabulary, comprehension, and ability to communicate in this language, fundamental skills for their future academic and professional success, as stated by [29].

Technological media currently provide activities that can propose tasks [27,30,31] where students engage and enjoy being part of a reading community. However, many primary school students face difficulties in developing reading habits. Factors that may influence this include a lack of access to English books, a lack of interest or motivation, or problems understanding the language.

Ref. [32] argues that presenting texts in physical and digital formats using various virtual media and using the available technology for reading comprehension students is essential. It creates a meaningful learning environment, as students are more interested when texts are projected through virtual media public in the classroom [33].

In their work, Ref. [34] mentions that reading comprehension is a cognitive process in which the reader can read various texts with different levels of complexity using appropriate fluency, tone of voice, and intonation. It is more than just reading a certain number of words in a given time.

In addition, Ref. [35] argue in their study that reading ability is a procedure that involves relating, extracting, and constructing the reader’s experiences and knowledge. From an educational perspective, these elements must be considered as they are beneficial for interpreting, evaluating, and managing information [36].

Therefore, it is essential to clearly understand the characteristics of texts to achieve quality comprehension as part of a cognitive process [37,38].

The bibliometric analysis uses the Vosviewer software tool, which made it possible to analyze the countries where research is being conducted on PBL and its relationships with other countries through scientific documents published in Web of Science and Scopus.

Looking at Figure 2a, the data from Scopus reveals that the United States is still the country with the most research publications on PBL, with 408 documents and 589 citations. Australia has a considerably high number of publications, with 60,124 papers, but a relatively low number of sources, with only 135. Spain follows the United States and has many publications with 198 documents and 393 citations. China has 153 compositions and 177 citations, while Indonesia has 182 papers and 173 medals. The United Kingdom has a moderate number of publications, with 63 documents and 111 sources. Germany, Portugal, and Taiwan have lower numbers of publications, with 49, 47, and 55 papers, but still have a significant number of citations, with 77, 123, and 180, respectively. Malaysia, Brazil, Norway, Hong Kong, and Sweden have even fewer publications and sources, with 53, 59, 25, 25, and 23 documents, respectively.

As shown in Figure 2b, the data from the Web of Science reveals that the United States has the most research publications on PBL, with 178 documents and 6277 citations. China follows this with 124 papers and 1491 citations, and Canada with 54 records and 1093 citations. Australia, Denmark, and England also have many publications on this topic, with 63, 55, and 55 documents, respectively.

The Netherlands has fewer publications, with 47 papers, but has many citations, with 2869. Germany and Sweden have lower numbers of publications, with 18 and 23 documents, respectively, but still have a significant number of sources, with 283 and 440, respectively. Qatar has minor publications and citations, with only 16 documents and 71 medals.

The data from both databases indicate that PBL is a popular research topic in the United States, China, Canada, Australia, and Europe. The United States has the highest number of publications and citations in both databases, indicating its leading position in PBL research. Australia has an increased number of publications, but a relatively low number of sources, meaning their study may not be as impactful as those from the United States or Europe. China also has many publications, but its citations are lower than the United States and European countries.

Moreover, the data from Scopus reveals that Spain is a significant player in PBL research, with many publications and citations [39,40]. Indonesia also has many journals and sources, indicating that it is an emerging country in PBL research [41,42]. On the other hand, countries such as Brazil, Norway, Hong Kong, and Sweden have a small number of publications and citations, indicating their relatively minor role in PBL research.

The United States is the dominant country in PBL research, with the most publications and citations in both databases. Australia has an increased number of publications but a relatively low number of sources. In contrast, China has many magazines, but its citations are lower than in the United States and European countries. Europe, particularly Spain and Portugal, is significant in PBL research.

About Table 1, The list of universities researching the PBL is quite diverse, with some universities leading regarding the number of documents published and citations received. The University of California, Berkeley, and Stanford University stands out with 5 and 7 papers published and 1518 and 1454 citations, respectively. It indicates a high level of research activity and the impact of their research on the academic community.

Other notable universities include Michigan University, with 11 documents published and 574 citations; the Technion Israel Institute of Technology, with 12 papers published and 363 citations; and the National Taiwan University of Science, with 10 published and 350 sources. These universities have a significant research output and actively contribute to advancing knowledge in the PBL field.

It is interesting to note that some universities with fewer documents published, such as Hong Kong University, with 14 papers published and 316 citations, have a similar or even more significant impact than other universities with more documents. The quality of research, rather than the quantity, plays a crucial role in the effects of research in the PBL field.

Additionally, it is essential to highlight that universities from different regions are researching PBL. For instance, universities from Spain, Indonesia, and Qatar are represented in the list. It indicates that the PBL approach is gaining popularity and recognition globally.

However, some universities in the list have a low number of documents published and citations, such as Universitas Negeri Malang, with only 3 and 12 sources, and National Taiwan University of Science and Technology, with four papers published and eight citations. It suggests that these universities have a lower research output and impact in the PBL field.

The analysis of the most influential universities researching PBL strategies is relevant to the study project because this study aims to improve reading and comprehension skills in the English language through PBL methodology. The universities named demonstrate a high level of research activity and impact on the academic community, indicating that PBL is a well-studied and practical approach. Additionally, the global representation of universities researching PBL highlights its growing popularity and recognition, emphasizing the need to explore its potential for further advancements in diverse educational contexts.

Table 2 presents the most relevant studies on the subject, which justifies the relevance of this research supported by authors whose works are related to peer instruction and PBL, which were investigated through scientific literature from various databases. The pieces were analyzed based on three critical aspects: problem, constraint, and proposal. The authors aimed to contrast the results obtained from each type of instruction based on the proposed aspects.

Of the ten works, eight identified the problem of traditional teaching methods, characterized by teachers’ need for more motivation and interest in reading to develop students’ soft skills. In contrast, PBL was proposed as a solution to address this problem. Additionally, the works identified various constraints, such as limited appropriate reading materials, commitment and accessibility to reading materials, and training on reading strategies, which may affect the implementation of PBL methodology.

The proposals presented in the works as solutions included training on PBL. Some results suggested that learning strategies should be adopted to ensure the success of PBL. Other works suggested implementing a motivation for project-based practices and student participation.