MES10, Hyderabad, India: Steffensen and Rangnes: Research paper with presentation
AERA 2019, Toronto, Canada: Steffensen: Presentation in Symposium
#Klimaomstilling2019, Sogndal, Norway: Steffensen: Presentation
ICTMA, Hong Kong: Steffensen and Kacerja: Presentation of Research Paper
ICTMA, Hong Kong: Steffensen: Poster presentation: Steffensen_Road tolls
Book chapter: Steffensen and Hansen: Climate change in mathematics teaching – teachers perspectives. Boklansering av boken, plenumspresentasjon Slide_1.