Able, Gifted and Talented UnderachieversAble, Gifted and Talented Underachievers, Second Edition explains the origins of underachievement, both overt and covert, especially in more able learners. It provides a model that identifies a range of external and internal factors that work in concert to lower achievement. Formal tests identify some underachievers but more than two thirds remain unidentified and other strategies are needed, in particular cognitive based curriculum challenge and