Streaming (or ability grouping or tracking, as the Americans would have it) has been tried, thrown out, revived, recommended, debunked and debated periodically in recent decades. Writing for New Zealand teachers in the mid-70s, Elley provided a balanced and comprehensive coverage of research for and against this common organizational practice. His review of the research is reprinted with minor revisions as item 8 in this set, No.2, 1984. He pointed up some of the deficiencies in the research (most of it of overseas origin), and drew attention to the paucity of fully controlled and properly designed large-scale studies in the area. In conclusion, Elley wrote: 'Clearly the last word has not been said on streaming, nor the last experiment conducted'.