This notion has particularly been highlighted by Driscoll (2005 , who emphasized that learning is a hierarchical process which requires instructional and illustrative approach at the preliminary levels so as to facilitate proper understanding of the more complex concepts in the of the hierarchy . However , it must be duly noted that is not as easy to balanced classroom groupings at the secondary level where a considerable amount of grouping is pegged to coarse selection , as it is to achieve a similar...
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