Sefanie Wrieden

bettermarks GmbH engages in the provision of adaptive learning system for mathematics. It helps students, teachers, and parents calculate tasks on their tablet, computer, and smartphone. The company was founded by Arndt Kwiatkowski, Marianne Voigt and Christophe Speroni in 2008 and is headquartered in Berlin, Germany.

bettermarks GmbH engages in the provision of adaptive learning system for mathematics. It helps students, teachers, and parents calculate tasks on their tablet, computer, and smartphone. The company was founded by Arndt Kwiatkowski, Marianne Voigt and Christophe Speroni in 2008 and is headquartered in Berlin, Germany.

bettermarks GmbH engages in the provision of adaptive learning system for mathematics. It helps students, teachers, and parents calculate tasks on their tablet, computer, and smartphone. The company was founded by Arndt Kwiatkowski, Marianne Voigt and Christophe Speroni in 2008 and is headquartered in Berlin, Germany.