A prominent goal of Languag-E-Chance was the realization of learning-based HSL developments. The accurate linguistic description of handshapes (or more broadly the phonemes of sign languages) are of utmost importance for both sign language education and the increasing number of learners of sign languages. Furthermore, these results support the annotation practices in sign language corpus linguistic research. Recent linguistic and educational-linguistic research implied the need for the rethinking of previous phonological studies of HSL, re-conceptualizing the hitherto used frameworks, terminology, and methods. The relevance of visual sign-phonological studies is also present in the teaching of reading: fingerspelling has been successfully applied in teaching reading not only for deaf, but hearing children as well. Fingerspelling could be the phonological link to writing. In addition, the results can be used to improve the search engines of multimodal sign language dictionaries. The studies and their easily accessible summaries describe and illustrate the fundamental mechanisms of visual phonology, which can contribute to the acquisition of reading and writing for both deaf and hearing children with reading and writing difficulties.