In an effort to evaluate the effectiveness of various practices and materials used in the classroom, teachers were asked to assess the use of English and Icelandic language. Based on the data gathered, lectures, slides, discussions and reading materials were either solely or predominantly delivered in Icelandic, at both primary and secondary school levels.

At the primary school level, lectures and slides showed the highest levels of Icelandic usage, with 71.3% and 68.1% respectively. At the secondary level, lectures and discussions showed the highest Icelandic usage, with 69.7% and 70.2% respectively. However, there was a slight increase in the use of English from primary to secondary level.

This increase was most notable in lectures and discussions and can be attributed to English teachers in secondary schools employing more English language use in their classrooms than their primary school counterparts. Use of English in lectures increased from 19% in primary schools to 50% in secondary schools, for slides from 27% to 71.9%, for discussions from 10.2% to 40.6% and for reading material from 36.7% to 71.9%.

Overall, the use of Icelandic language was prevalent in the classroom, especially in primary schools, but the increase in English language usage at the secondary school level is noteworthy and highlights its importance in language education.