“…Work covered in this review a variety of XR systems from the learning standpoint. For example, for the education setting, the reviewed work span from informal learning [42,48,55,64,67,83,84,103]to formal learning [45,46,53,54,65,85], the target learners age range from K-12 children [45,53,54,66,67,85,98] to college students in higher ed settings or other adults [56,65,77,81,83,84,100,101]; the domain subjects that educational XR systems target in our review also span from math [55,56,67,101], science (e.g. physics [44,48,54,99], animal science [41]), programming and coding [60,61], to language learning [47,84,85,98,102,103] and art…”