Primary education lasts for four years preceded by one year of pre-school education.

初等教育为四年，之前有一年的学前教育。

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Basic education is comprised of pre-school (3-5 years old), primary school (6-11 years old), and secondary school (12-17 years old.)

基础教育是由学前教育(3—5岁)、小学(6—11岁)和初中(12—17岁)组成的。

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Unequal access to early childhood education for lower-income households, mainly due to provision of pre-primary education by the private sector.

低收入家庭无法获得平等的儿童早期教育机会，主要原因是学前教育有私营部门提供。

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Welcoming the progress that has been made in in pre-primary education since 2000, Irina Bokova pointed out that nonetheless only 15 percent children are enrolled in pre-primary education in Sub-Saharan Africa, 19 percent in Arab States, 28 percent in Central Asia and 36 percent South and West Asia.

UNESCO: Education

Projections from exit polls also take into account the consistency between exit poll results and pre-primary polls.

CNN: How does CNN make primary projections?

Enrolment in pre-primary, secondary and tertiary education has also grown by more than 60% during the same period.

UNESCO: EDUCATION