primary levels explained

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What are the benefits of the Oxford Levels?
Learning to read means mastering a lot of different skills, and learners progress in small steps. That’s why the 21 Oxford Levels offer a details, finely graded progression – taking learners from their very first steps in reading, all the way up to being skilful, independent readers. Oxford Levelled books use an expertly researched and well-established system for fine-levelling to match children to books that will progressively develop their skills at every step of their reading journey.

References:

http://www.goodschoolsguide.co.uk/curricula-and-exams/sats-standard-assessment-tests
http://global.oup.com/education/content/primary/key-issues/oxford-levels-international/
http://www.oph.fi/en/education-system/basic-education