“…A model of the sequence in which learners progress in conceptual understanding of any one topic, which can be composed on the basis of cognitive theory, and research on students' learning of the topic, can be used both to match tasks to particular student groups, and to set up criteria against which to assess progress in learning. In science, this approach is illustrated by the detailed analysis reported by Smith, Wiser, Anderson, and Krajcik (2006), whilst the value of this approach for both formative and summative purposes is illustrated in the work of the BEAR project (Wilson & Draney, 2004). In Australia, "learning maps" of typical progress in spelling, reading, listening, and spelling have been developed (Forster & Masters, 2004) while in the UK the Graded Assessment in Mathematics (GAIM) project developed hierarchies of learning in mathematics (Brown, 1992).…”