STEMSiL contributes to the inclusivity of STEM education, by aiming to support teachers, deaf students and Sign Language (SL) interpreters of primary and secondary education to improve their knowledge of STEM fields through the use of Sign Language. STEMSiL will develop a new approach on teaching STEM in deaf education through a tailor-made methodology, a visual STEM lexicon in Sign Language, while also guiding students, teachers and SL interpreters to co-create real-life STEM projects.