Multimodal Algebra Learning: From Math Manipulatives to Tangible User Interfaces. - Anke V. Reinschlüssel; Dmitry Alexandrovsky; Tanja Döring; Angelie Kraft; Maike Braukmüller; Thomas Janßen; David Reid; Estela Vallejo; Angelika Bikner-Ahsbahs; Rainer Malaka (i-com, 2018)