At least 1,000 high school students in Papua New Guinea's Eastern Highlands province are expected to miss out on classes next year because of a lack of class rooms.
5,000 children have enrolled to attend class nine next year.
The province's examination supervisor, Felix Dennis, says about 1,000 children are expected to fail their year eight exams, which leaves about 1000 children with no space to learn in next year.
"There're 5000 enrolled. 3000 will have space. The others will not have space due to this problem that we don't have enough space here in the province."
Felix Dennis says the same problem may apply to students attending higher high school grades.
Mr Dennis says the government should build more high school facilities.