What are the three major differences between taba and wheeler model of curriculum development?

The Taba model emphasizes a grassroots approach, advocating for curriculum development to begin with teachers who assess student needs, whereas the Wheeler model is more top-down, focusing on a systematic design led by curriculum planners. Taba's model is iterative, involving continuous feedback and revision, while Wheeler's is more linear and structured. Additionally, Taba prioritizes the formulation of objectives based on learner needs, while Wheeler emphasizes the interrelation of objectives, content, and evaluation in a cohesive framework.