Horizontal and vertical organizations are two necessary dimensions of any curriculum design.

Vertical organization (sequence, continuity) deals with the longitudinal arrangement of the design components.

Horizontal organization (scope, integration) deals with the side-by- side arrangement of the components in the curriculum design.

A spiral concept of the curriculum provides for both horizontal (widening of knowledge) and vertical (deepening of knowledge) aspects of the curriculum design simultaneously. The figure below shows the concept of horizontal and vertical articulation from preschool to adult.

Horizontal and vertical Articulation

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