Räume bilden: ein Mathematikraum für den Kindergarten.Talk, February 15th, 2017 at the fair "didacta - die Bildungsmesse", Stuttgart, Germany.
Hvordan lærer barn matematikk? Rike og varierte erfaringer bygger forståelse. Talk,November 22nd and 24th, 2016 at the conference "Barnehagenkonferanse", Bodø and Oslo, Norway.
Pupils’ misconceptions about difficult maths topics. Talk, June 17th, 2016 at the vidumath conference in Sofia, Bulgaria.
A room for mathematics in early childhood. Talk, September 9th, 2015 at 25rd EECERA Annual Conference, September 7th till 10th, 2015 in Barcelona, Catalunya, Spain.
Investigating the structure, level and development of professional skills of preschool teachers in mathematics. Talk, July 11th, 2012, 12th International Congress on Mathematical Education (ICME-12) in Seoul, South-Korea.