“…In this research, 16 relatively high-quality research reviews in the last 5 years have been searched from the major databases in this field (Web of Science, EBSCO ERIC (Education Resources Information Center), IEEE Xplore and SpringerLink). After reviewing these papers, it is found that their main concerns can be summarized into the following four aspects: the effectiveness of GBL ( Meredith, 2016 ; Byun and Joung, 2018 ; Hussein et al, 2019 ; Pellas et al, 2019 ; Tokac et al, 2019 ; Chen et al, 2020 ; Garcia et al, 2020 ; Karakoç et al, 2020 ; Stančin et al, 2020 ), the future trend of GBL ( Giannakas et al, 2018 ; Gao et al, 2020 ), the influencing factors of GBL ( Perttula et al, 2017 ; Shu and Liu, 2019 ), the theoretical foundations of GBL’s effectiveness and its practical use ( Carenys and Moya, 2016 ; Bakan and Bakan, 2018 ; Ab Jalil et al, 2020 ).…”