Lower secondary education and upper secondary education lasts for three years each.

在挪威，初级教育为期7年，初中和高中教育各有三年。

youdao

According to UNESCO, only 13% of girls and boys have equal access to upper secondary education.

根据联合国教科文组织的数据，只有13%的女孩子拥有与男孩子相同的受高中教育的机会。

youdao

Range of tuitions in general upper secondary education in various regions has reached to 10.59, higher than the range of pure income of peasants per person (i. e. 3.1).

普通高中学费的地区差异（两极差异）达到10.59倍，高出农民人均纯收入的地区差异（3.1倍）。

youdao

Three lesson plans are proposed for elementary, lower secondary and upper secondary education.

UNESCO: UK National Commission for UNESCO :: Education materials from UNESCO and partner organisations

Data on the proportion of persons aged 25-64 who have completed upper secondary education show that the United States, with 86 percent, ranks highest among 26 industrial countries.

UNESCO: II Part Analytic Section

Yet in terms of enrolment, sub-Saharan Africa has made the greatest gains of all regions, with gross enrolment ratios rising from 28% to 43% for lower secondary and from 20% to 27% for upper secondary education between 1999 and 2009.

UNESCO: World Water Assessment Programme (WWAP)