"A primary school, junior school (in UK), elementary school or grade school (in US & Canada) is a school for children from about four to eleven ...
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years old, in which they receive primary or elementary education. It can refer to both the physical structure (buildings) and the organisation. Typically it comes after preschool, and before secondary school.
The International Standard Classification of Education considers primary education as a single phase where programmes are typically designed to provide fundamental skills in reading, writing and mathematics and to establish a solid foundation for learning. This is ISCED Level 1: Primary education or first stage of basic education." - (en.wikipedia.org 02.03.2020)
