“…Looking at Ärlebäck's (2009c) dissertation, it includes and discusses five different papers with different aims. The papers investigate teachers' beliefs and affects (Ärlebäck, 2010), students' modelling competency (Frejd & Ärlebäck, 2011), introducing mathematical modelling by Fermi problems (Ärlebäck, 2009d), curriculum aspects (Ärlebäck, 2009b) and designing and implementing of modelling activities into secondary school (Ärlebäck, 2009a). A brief summary with the main conclusions will be provided below.…”