Group sizes were also often named as a barrier for multigrade teaching and the teachers that teach a big group of students in a team of more than three teachers were less likely to see the purpose and benefits of multigrade teaching.
Hópastærðir virtust einnig spila lykilhlutverk og þeir kennarar sem störfuðu í fjölmennu teymi með stóran hóp nemenda virtust síður sjá kostina með samkennslu árganga.