Education tier

Education tier expresses text difficulty as the stage of schooling a reader would typically need to follow it comfortably: Primary, Lower secondary, Upper secondary, or Tertiary (university-level). The tiers follow the international ISCED classification of education levels.

It is one of three scales Silktide offers for the same readability measurement, alongside reading age and the CEFR. Accessibility guidance often refers to it directly: WCAG recommends that general content should not require more than lower secondary education to understand.

Find out more

• International Standard Classification of Education (ISCED) - UNESCO Institute for Statistics
• Reading age
• CEFR