Background and activities

Heidi Strømskag is an Associate Professor at the Department of Mathematical Sciences since 2015. She has a MSc in mathematics from NTNU, and a PhD in mathematics education from the University of Agder. Strømskag is a member of the research group for didactics of mathematics. Her research areas are teaching and learning of algebra, didactic design, and mathematical modelling. 

Project: CiviMatics – Interdisciplinary mathematical modelling meets civic education (Erasmus+).

Strømskag is a member of the INDRUM Scientific Committee (International Network for Didactic Research in University Mathematics). She is leader of the Teaching Committee of the Norwegian Mathematics Council, and Norway's representative to ICMI (International Commission on Mathematical Instruction). 

TEACHING:

MA3061 Design and analysis of mathematics teaching (Autumn 2021).
MA3001 Mathematical modelling through study and research paths (Spring 2022).

Scientific, academic and artistic work

Displaying a selection of activities. See all publications in the database

Journal publications

Part of book/report

  • Grenier-Boley, Nicolas; Nicolás, Pedro; Strømskag, Heidi; Tabchi, Theresia. (2021) Mathematics teaching practices at university level. Research and Development in University Mathematics Education. Overview Produced by the International Network for Research on Didactics of University Mathematics.
  • Strømskag, Heidi. (2021) Prospective Teachers Solving a Percentage Problem: An Analysis of the Construction of a Praxeology. Extended Abstracts Spring 2019: Advances in the Anthropological Theory of the Didactic.
  • Abboud, Maha; Coles, Alf; Chesnais, Aurélie; Horoks, Julie; Jaworski, Barbara; Mangiante-Orsola, Christine; Perrin-Glorian, Marie-Jeanne; Strømskag, Heidi; Robert, Aline; Rogalski, Janine. (2020) Quand des didacticiens de mathématiques français discutent des théories avec des chercheurs britanniques et européens. Actes du séminaire de didactique des mathématiques. Année 2019.
  • Strømskag, Heidi. (2020) Didaktisk ingeniørvirksomhet i matematikk: Multiplikasjon som modell for situasjoner på 3. trinn. Samtaleorientert matematikk: Et samspill mellom didaktiske og adidaktiske situasjoner.
  • Strømskag, Heidi. (2020) Teorien for didaktiske situasjoner i matematikk: Et systemisk rammeverk for å utvikle og studere matematikkundervisning. Samtaleorientert matematikk: Et samspill mellom didaktiske og adidaktiske situasjoner.
  • Chimoni, Maria; Hewitt, Dave; Oldenburg, Reinhard; Strømskag, Heidi. (2019) Algebraic thinking. Proceedings of the Eleventh Congress of the European Society for Research in Mathematics Education.
  • Rønning, Frode; Strømskag, Heidi. (2019) Sense and reference of signifiers for elements of polygons. Proceedings of the Eleventh Congress of the European Society for Research in Mathematics Education.
  • Hodgen, Jeremy; Oldenburg, Reinhard; Strømskag, Heidi. (2018) Algebraic thinking. Developing Research in Mathematics Education: Twenty Years of Communication, Cooperation and Collaboration in Europe (European Research in Mathematics Education).
  • Banerjee, Rakhi; Strømskag, Heidi. (2017) Topic Study Group No. 11: Teaching and Learning of Algebra. Proceedings of the 13th International Congress on Mathematical Education.
  • Hewitt, Dave; Oldenburg, Reinhard; Postelnicu, Valentina; Strømskag, Heidi. (2017) Introduction to the papers of TWG03: Algebraic thinking. Proceedings of the Tenth Congress of the European Society for Research in Mathematics Education (CERME 10).
  • Rønning, Frode; Strømskag, Heidi. (2017) Entering the mathematical register through evolution of the material milieu for classification of polygons. Proceedings of the Tenth Congress of the European Society for Research in Mathematics Education (CERME 10).
  • Strømskag, Heidi; Jaworski, Barbara. (2017) Modelling situations involving equal-sized groups. Proceedings of the 41st Conference of the International Group for the Psychology of Mathematics Education (Vol. 1).
  • Strømskag, Heidi; Valenta, Anita. (2017) Constraints to a justification of commutativity of multiplication. Proceedings of the Tenth Congress of the European Society for Research in Mathematics Education (CERME 10).
  • Ainley, Janet; Margolinas, Claire; Barquero, Berta; Bikner-Ahsbahs, Angelika; Calleja, James; Clarke, David; Coles, Alf; Gardner, Kimberley; Gimenez, Joaquim; Johnson, Heather L.; Lin, Pi-Jen; Lithner, Johan; Måsøval, Heidi Strømskag; Radonich, Peter; Savard, Annie. (2015) Accounting for student perspectives in task design. Task design in mathematics education.
  • Hodgen, Jeremy; Oldenburg, Reinhard; Postelnicu, Valentina; Strømskag, Heidi. (2015) Introduction to the papers of TWG03: Algebraic thinking. Proceedings of the Ninth Congress of the European Society for Research in Mathematics Education.
  • Strømskag, Heidi. (2015) A pattern-based approach to elementary algebra. Proceedings of the Ninth Congress of the European Society for Research in Mathematics Education.
  • Clarke, David; Strømskag, Heidi; Johnson, Heather Lynn; Bikner-Ahsbahs, Angelika; Gardner, Kimberley. (2014) Mathematical tasks and the student. Proceedings of the 38th Conference of the International Group for the Psychology of Mathematics Education and the 36th Conference of the North American Chapter of the Psychology of Mathematics Education.
  • Strømskag, Heidi. (2014) Didactical handling of a gap between a teacher's intention and students' mathematical activity. Proceedings of the 38th Conference of the International Group for the Psychology of Mathematics Education and the 36th Conference of the North American Chapter of the Psychology of Mathematics Education.
  • Måsøval, Heidi Strømskag. (2013) An adidactical milieu that fails to prepare for an intended statement of equivalence. Proceedings of the 37th Conference of the International Group for the Psychology of Mathematics Education: Mathematics learning across the life span.
  • Måsøval, Heidi Strømskag. (2013) From recursive to explicit formula for the n-th member of a sequence mapped from a shape pattern. Proceedings of the Eighth Congress of the European Society for Research in Mathematics Education.
  • Måsøval, Heidi Strømskag. (2013) Shortcomings in the milieu for algebraic generalisation arising from task design and vagueness in mathematical discourse. Task design in mathematics education. Proceedings of ICMI Study 22.
  • Måsøval, Heidi Strømskag. (2009) Complexity of operating beyond naïve empiricism when proving a conjectured formula for the general term of a geometrical pattern. Nordic Research in Mathematics Education.
  • Goodchild, Simon; Jaworski, Barbara; Måsøval, Heidi Strømskag. (2007) Workshop on classroom research: Analysis of transcript data. Relating practice and research in mathematics education: Proceedings of NORMA 05, Fourth Nordic Conference on Mathematics Education.
  • Måsøval, Heidi Strømskag. (2007) Efficiency or rigor? When students see the target as 'doing' more than 'knowing' mathematics. Relating practice and research in mathematics education: Proceedings of NORMA 05, Fourth Nordic Conference on Mathematics Education.
  • Måsøval, Heidi Strømskag. (2005) When negotiation of mathematical meaning is replaced by striving for fulfilment of the didactical contract. Didactics of mathematics - The French way.
  • Måsøval, Heidi Strømskag; Rønning, Frode. (2005) An inductive approach to conceptual development in the area of functions. Conceptions of Mathematics Proceedings of Norma01. Third Nordic Conference on Mathematics Education.
  • Måsøval, Heidi Strømskag; Rønning, Frode. (2005) Matematikk og kunst - kommunikasjon og komposisjon. Mangfold i matematikken. Motivert for matematikk. Sommerkursrapport 2001 og 2002.
  • Måsøval, Heidi Strømskag; Smidt, Jon; Rønning, Frode. (2003) Helhet og sammenheng i lærerutdanningen: Forsøk med ny studiemodell for allmennlærerutdanning med vekt på realfag ved Høgskolen i Sør-Trøndelag. Koordinert lærerutdanningsdidaktikk? : idéer og erfaringer.

Report/dissertation

Others

  • Fleischmann, Yael; Rønning, Frode; Strømskag, Heidi. (2021) Modelling of climate change in the CiviMatics project. Herbsttagung des GDM-Arbeitskreises 'Mathematik und Bildung' . Gesellschaft für Didaktik der Mathematik; Digtial. 2021-10-22 - 2021-10-22.
  • Mangiante-Orsola, Christine; Perrin-Glorian, Marie-Jeanne; Strømskag, Heidi. (2019) La théorie des situations didactiques comme outil pour comprendre et développer les pratiques professionnelles des enseignants en mathématiques. Séminaire de didactique des mathématiques de l’ARDM . L'Assoc. pour la recherche en didactique des mathématique; Paris. 2019-03-28 - 2019-03-29.
  • Rønning, Frode; Strømskag, Heidi. (2019) Sense and reference of signifiers for elements of polygons. Eleventh Congress of the European Society for Research in Mathematics Education (CERME 11) . Freudenthal Group, Utrecht University & ERME; Utrecht. 2019-02-06 - 2019-02-10.
  • Strømskag, Heidi. (2019) Overgang fra matematikk i skolen til matematikk i høyere utdanning. Årsmøte i Norsk Matematikkråd ; Stavanger. 2019-09-18 - 2019-09-20.
  • Strømskag, Heidi. (2019) Prospective teachers inquiring into an involved problem of percents: An analysis of conditions and constraints using ATD tools. IRP Advances in the Anthropological Theory of the Didactic and their consequences in curricula and in teacher education . Centre de Recerca Matemàtica; Barcelona. 2019-06-17 - 2019-06-28.
  • Strømskag, Heidi. (2018) A model for instructional design in mathematics implemented in teacher education. INDRUM 2018 Second Conference of the International Network for Didactic Research in University Mathematics . University of Agder; Kristiansand. 2018-04-05 - 2018-04-07.
  • Strømskag, Heidi. (2018) Didactical design for the mathematics classroom. Language Use and Development in the Mathematics Classroom . LaUDiM; Trondheim. 2018-11-28 - 2018-11-29.
  • Strømskag, Heidi. (2018) Tensions between the mathematical knowledge at stake and the situational models used to illustrate the knowledge: A case from a Norwegian 3rd grade classroom. Seminar . Universitat de Barcelona; Barcelona. 2018-12-13.
  • Strømskag, Heidi. (2018) Why do some people have problems comprehending mathematics?. Forum for matematiske perler ; Institutt for matematiske fag, NTNU. 2018-09-07 - 2018-09-07.
  • Mangiante-Orsola, Christine; Perrin-Glorian, Marie-Jeanne; Strømskag, Heidi. (2017) Theory of didactical situations as a tool to understand and develop mathematics teachers' practices. Symposium Frengly 3 . Laboratoire de Didactique André Revuz; Université Paris-Diderot. 2017-11-16 - 2017-11-18.
  • Rønning, Frode; Strømskag, Heidi. (2017) Entering the mathematical register through evolution of the material milieu for classification of polygons. Tenth Congress of the European Society for Research in Mathematics Education (CERME 10) ; Dublin. 2017-02-01 - 2017-02-05.
  • Strømskag, Heidi. (2017) A methodology for instructional design in mathematics. Oberseminar Didaktik der Mathematik . Universität Augsburg, Institut für Mathematik; Augsburg. 2017-07-10.
  • Strømskag, Heidi. (2017) A methodology for instructional design in mathematics. Eighth Nordic Conference on Mathematics Education . Stockholm University, NORME; Stockholm. 2017-05-30 - 2017-06-02.
  • Strømskag, Heidi. (2017) Combining the theory of didactical situations and semiotic theory in an investigation of students’ enterprise of representing a relationship in algebraic notation. MEC Symposium. Algebra: Gateway to mathematics, science, society and the world . Mathematics Education Centre; Loughborough University. 2017-05-24 - 2017-05-25.
  • Strømskag, Heidi. (2017) Instruksjonsdesign i matematikk - en epistemologisk modell for en spesiell matematisk kunnskap. Seminar ved Institutt for lærerutdanning . Fagseksjon for matematikk; Institutt for lærerutdanning. 2017-11-17 - 2017-11-17.
  • Strømskag, Heidi; Jaworski, Barbara. (2017) Modelling situations involving equal-sized groups. PME 41 . Nanyang Technological University; Singapore. 2017-07-17 - 2017-07-22.
  • Strømskag, Heidi; Valenta, Anita. (2017) Justification of commutativity of multiplication at Grade 6. Tenth Congress of the European Society for Research in Mathematics Education (CERME 10) . European Society for Research in Mathematics Education; Dublin. 2017-02-01 - 2017-02-05.
  • Mangiante, Christine; Perrin-Glorian, Marie-Jeanne; Strømskag, Heidi. (2016) Using TDS to understand and develop mathematics teaching in primary classrooms in France and Norway. Symposium Frengly 2 . Laboratoire de Didactique André Revuz; Université Paris-Diderot. 2016-07-06 - 2016-07-08.
  • Strømskag, Heidi. (2016) Designing didactical situations for the elementary classroom: Conditions that enable or hinder mathematics learning. Advisory Board meeting for the LaUDiM project . The LaUDiM project; Faculty of Teacher and Interpreter Education, NTNU. 2016-06-16 - 2016-06-17.
  • Strømskag, Heidi. (2016) Evolution of the milieu for a particular piece of mathematical knowledge. The Thirteenth International Congress on Mathematical Education . Gesellschaft für Didaktik der Mathematik - GDM; Hamburg. 2016-07-24 - 2016-07-31.
  • Strømskag, Heidi. (2016) Interaction in the mathematics classroom - from the perspective of two different theories. MEC Seminar, Loughborough University . Loughborough University; Loughborough. 2016-03-17.
  • Strømskag, Heidi. (2015) A pattern-based approach to elementary algebra. 9th Congress of the European Society for Research in Mathematics Education . Charles University; Praha. 2015-02-04 - 2015-02-08.
  • Strømskag, Heidi. (2015) Analyse av kvalitative data ved koding og kategorisering. Seminar for forskergruppen SkrivSats . SkrivSats forskergruppe; HiST-ALT. 2015-02-25.
  • Strømskag, Heidi. (2015) Comparing and contrasting two theoretical approaches to social interaction in the mathematics classroom - The theory of didactical situations and the theory of social interactionism. Seminar, University of Gothenburg . University of Gothenburg; 2015-12-16.
  • Strømskag, Heidi. (2015) Flislegging for å finne en sammenheng mellom to typer tall. Novemberkonferansen . Norsk senter for matematikk i opplæringen; Trondheim. 2015-11-24 - 2016-11-25.
  • Strømskag, Heidi. (2015) Fra faktorer som hindrer algebraiske generaliseringsprosesser til design av epistemologiske modeller. Seminar ved Institutt for matematiske fag . Institutt for matematiske fag; NTNU. 2015-04-09 - 2015-04-09.
  • Strømskag, Heidi. (2015) Language use and development in the mathematics classroom: On the TDS. Research meeting with the reference group of LaUDiM . The LaUDiM project; Høgskolen i Sør-Trøndelag. 2015-06-02 - 2015-06-04.
  • Strømskag, Heidi. (2015) On the notion of an epistemological model. Seminar i matematikkdidaktikk . Matematikkseksjonen ved HiST-ALT; Høgkolen i Sør-Trøndelag. 2015-05-26 - 2015-05-27.
  • Strømskag, Heidi. (2015) TDS: Teorien for didaktiske situasjoner i matematikk – en modell og et analyseverktøy. Faglig forum . Høgskolen i Sør-Trøndelag; Avdeling for lærer- og tolkeutdanning. 2015-05-07.
  • Strømskag, Heidi. (2015) Transformation between different registers of semiotic representation of a mathematical object: A challenging task. Symposium “The Role of Mathematical Tasks in Promoting Domain-Specific and Domain-Transcendent Mathematical Reasoning" . European Conference on Educational Research (ECER 2015); Corvinus University of Budapest. 2015-09-07 - 2015-09-11.
  • Clarke, David; Strømskag, Heidi; Johnson, Heather Lynn; Bikner-Ahsbahs, Angelika; Gardner, Kimberley. (2014) Research Forum: Mathematical tasks and the student. PME 38 . International Group for the Psychology of Math Education; Vancouver. 2014-07-15 - 2014-07-20.
  • Måsøval, Heidi Strømskag. (2014) Building on the concept of milieu - in an open coding process. Symposium on French and UK research on mathematics teaching . Université Paris Diderot; Paris. 2014-01-30 - 2014-02-01.
  • Måsøval, Heidi Strømskag. (2014) Et epistemologisk perspektiv på matematikkundervisning: et eksempel fra algebra. Nasjonal konferanse om karaktersetting i matematikk i lærerutdanning . Nasjonalt råd for lærerutdanning, UHR; Trondheim. 2014-09-09 - 2014-09-10.
  • Måsøval, Heidi Strømskag. (2014) Student teachers’ pattern generalisation conceptualised through the theory of didactical situations in mathematics. Seminar, Københavns universitet . Institut for Naturfagenes Didaktik; København. 2014-09-05.
  • Strømskag, Heidi. (2014) Students’ mathematical activity constrained by the milieu: a case of algebra. Seventh Nordic Conference on Mathematics Education . University of Turku; Turku. 2014-06-03 - 2014-06-06.
  • Måsøval, Heidi Strømskag. (2013) Algebra i meningsfylte kontekster: Representasjon av generalitet i mønster. Seminar, Nasjonalt senter for matematikk i opplæringen . Nasjonalt senter for matematikk i opplæringen; Trondheim. 2013-11-22.
  • Måsøval, Heidi Strømskag. (2013) An adidactical milieu that fails to prepare for an intended statement of equivalence. PME 37 . Kiel University; Kiel. 2013-07-28 - 2013-08-02.
  • Måsøval, Heidi Strømskag. (2013) Formation of a gap between a teacher’s intention and students’ mathematical activity. Seminar, Göteborgs Universitet . Göteborgs universitet; Göteborg. 2013-09-26.
  • Måsøval, Heidi Strømskag. (2013) From recursive to explicit formula for the n-th member of a sequence mapped from a shape pattern. Eighth Congress of European Research in Mathematics Education . European Society for Research in Mathematics Education; Antalya. 2013-02-06 - 2013-02-10.
  • Måsøval, Heidi Strømskag. (2013) Shortcomings in the milieu for algebraic generalisation arising from task design and vagueness in mathematical discourse. ICMI 22 Study Conference on Task Design in Mathematics Education . International Commission on Mathematical Instruction; University of Oxford. 2013-07-22 - 2013-07-26.
  • Måsøval, Heidi Strømskag. (2012) Faktorer som begrenser studenters etablering av algebraisk generalitet i figurmønstre. Konferanse for lærerutdannere i matematikk . Universitetet i Tromsø; Sommarøya. 2012-09-24 - 2012-09-27.
  • Måsøval, Heidi Strømskag. (2012) Similarities and differences between didactical phenomena and patterns of mathematical interaction: Comparing Elements of the French School of Mathematics Education with elements of the Theory of Social Interactionism. Ph.D. trial lecture . University of Agder; Kristiansand. 2012-02-09 - 2012-02-09.
  • Måsøval, Heidi Strømskag; Burheim, Oda Tingstad. (2012) Forskningsbasert masterutdanning i matematikkdidaktikk. Studiekvalitetsdagen ved HiST . Høgskolen i Sør-Trøndelag; Trondheim. 2012-09-18.
  • Måsøval, Heidi Strømskag. (2010) Algebraisk generalisering: Når målet er en matematisk setning som uttrykker en relasjon mellom tallfølger. Lokallagsamling for Landslaget for Matematikk i Skolen . Landslaget for Matematikk i Skolen; Gardermoen. 2010-02-05 - 2010-02-07.
  • Bergsten, Christer; Fuglestad, Anne Berit; Måsøval, Heidi Strømskag; Wedege, Tine; Hannula, Markku S.. (2008) Research questions and themes for future research in mathematics education. Plenary Panel. The 5th Nordic Conference on Research in Mathematics Education ; København. 2008-04-21 - 2008-04-25.
  • Måsøval, Heidi Strømskag. (2008) Complexity of operating beyond naïve empiricism when proving a conjectured formula for the general term of a geometrical pattern. 5th Nordic Conference on Research in Mathematics Education ; Copenhagen. 2008-04-21 - 2008-04-25.
  • Måsøval, Heidi Strømskag. (2008) Expressing and justifying generality in geometrical patterns: A case study of first-year student teachers' small-group collaboration at a university college. Presentation of preliminary doctoral dissertation . Universitetet i Agder, Institutt for matematiske fag; Universitetet i Agder. 2008-04-11.
  • Breiteig, Trygve; Hundeland, Per Sigurd; Lorentzen, Svein; Måsøval, Heidi Strømskag; Sandvold, Karl Erik. (2007) Veien videre Paneldiskusjon. Bedre matematikkundervisning: Kan FoU hjelpe? . Norges forskningsråd; Oslo. 2007-10-17 - 2007-10-17.
  • Måsøval, Heidi Strømskag. (2007) Fra problemstilling knyttet til læring og undervisning av algebra til valg av metodisk tilnærming. Seminar . NTNU (Norges teknisk-naturvitenskapelige universitet), PLU; Høgskolen i Sør-Trøndelag, Trondheim. 2007-08-21 - 2007-08-22.
  • Måsøval, Heidi Strømskag. (2007) Research on student teachers' generalisation processes in algebra: A theoretical perspective. Seminar . Mathematics Education Centre; Loughborough University. 2007-11-05.
  • Måsøval, Heidi Strømskag. (2006) Bruk av teori i analyse av data fra klasserommet i matematikk. KUL Matematikk: Læringsfellesskap og IKT i læring . Universitetet i Agder; Kristiansand. 2006-09-05 - 2006-09-07.
  • Måsøval, Heidi Strømskag; Rønning, Frode. (2006) Utvikling av faglig profesjonalitet - i spenningsfeltet mellom matematisk kunnskap og elevers utforsking. Fra skoleport til klasserom . Nasjonalt nettverk for kvalitetsvurdering; Trondheim. 2006-03-29 - 2006-03-30.
  • Måsøval, Heidi Strømskag; Rønning, Frode. (2006) Ways in which mathematics is necessary for developing didactical knowledge in mathematics. What is the specific role of mathematics in mathematics education research? . NTNU; Trondheim. 2006-11-09.
  • Goodchild, Simon; Jaworski, Barbara; Måsøval, Heidi Strømskag. (2005) Learning from students´ talk in mathematics classroom: Workshop on classroom research. NORMA 05: Fourth Nordic Conference on Mathematics Education . HiST, NTNU; Trondheim. 2005-09-02 - 2005-09-06.
  • Måsøval, Heidi Strømskag. (2005) When students see the target as 'doing' more than 'knowing'. NORMA 05: Fourth Nordic Conference on Mathematics Education . HiST, NTNU; Trondheim. 2005-09-02 - 2005-09-06.
  • Måsøval, Heidi Strømskag. (2004) Student authority in mathematics classroom discourse. The 28th Conference of the International Group for the Psychology of Mathematics Education . Høgskolen i Bergen; Bergen. 2004-07-14 - 2004-07-18.
  • Jenssen, Annepetra; Måsøval, Heidi Strømskag. (2003) Tverrfaglig uteskole med vekt på kroppsøving og matematikk -`Utfordringer til hode og kropp´: Parallellsesjon. Barn og ungdom ut i naturen: Nordisk idrettslærerkongress ; Oppdal. 2003-06-23 - 2003-06-27.
  • Måsøval, Heidi Strømskag. (2003) Forsøk med ny studiemodell for allmennlærerutdanning med vekt på realfag. Midt-Norsk Nettverks FOU-dag ; Trondheim. 2003-02-14 - 2003-02-14.
  • Måsøval, Heidi Strømskag. (2003) Uterommet som læringsarena: Verksted. Det generelle i det spesielle - problemer i spenningsfeltet mellom det konkrete og det abstrakte i matematikken ; Bø i Telemark. 2003-09-22 - 2003-09-25.
  • Måsøval, Heidi Strømskag; Rønning, Frode. (2001) An inductive approach to conceptual development in the area of functions. Conceptions of mathematics . Högskolan Kristianstad; Kristianstad. 2001-06-08 - 2001-06-12.
  • Måsøval, Heidi Strømskag; Rønning, Frode. (2001) Matematikk og kunst - kommunikasjon og komposisjon: Verksted. Mangfold i matematikken: LAMIS' sommerkurs ; Kristiansand. 2001-08-07 - 2001-08-10.
  • Botten, Geir; Måsøval, Heidi Strømskag. (2000) Matematiske skattejakter: Verksted. Matematik 2000 – Fokus i teorier og praksis ; Borgarfjörður. 2000-06-22 - 2000-06-26.
  • Måsøval, Heidi Strømskag; Rønning, Frode. (2000) Semiregulære og aperiodiske tesselleringer. Geometri - mer enn passer, linjal og blyant . HiST; Røros. 2000-09-25 - 2000-09-28.