In Denmark the 10th grade may refer to an extra year of primary school. Earlier, 10th grade was mostly for people who had a hard time in primary school and needed an extra year to prepare for high school (or another secondary education of some sort), but nowadays, it is widely popular amongst challenged and gifted students alike and usual attended at a special kind of boarding school called an "Efterskole". 10th can also be attended at a regular school, though. This year is usually taken as a way to get a break from the school system and relax and try something different before moving on to high school.
