Digitalization and multidisciplinary approach are the new trends in Teaching and Learning theory and practice. The article lays emphasis on mathematics teaching and learning knowledge, based on Action Research Theory, New Learning Theory and Variation Theory. Preservice early elementary school teachers created audiovisual video films (AV) and Podcasts (PD) lessons integrating Mathematics, Music and Language during a university course in teacher education. These multidisciplinary lessons were used as intelligent tutors in a flipped classroom model. The lessons are dealing with proportionality, one of the most difficult items in elementary school mathematical curriculum. For explaining proportionality, the preservice teachers have used multiple representations such as manipulatives, fiction stories, videogame Minecraft, “Smash up” in tennis table, musical intervals, self-composed, self-written and self-performed songs about mathematical rules in easy to remember rap-style. Preservice teachers have shown their AV or PD lessons to elementary school students followed by joint discussions and exercisers in solving of mathematical problems. Preservice teachers analyzed their work in an essay-form report describing creation of their intelligent tutors for elementary school students’ knowledge development in mathematics, music and language, including pronunciation, explanation and understanding of mathematical terminology. The multipart flipped classroom approach promoted prospective teachers’ professional growth. For future analysis the described multipart flipped classroom model can be further developed in international collaboration.