Levis (1999) suggested that intonation problems are
typical of both traditional and modern ELT textbooks and
point out that these shortcomings can often be overcome
or "greatly lessened by thinking differently about the uses
of intonation and the needs and abilities of learners".
More specifically, he has stated that pronunciation skills
such as stress and intonation should only be taught in an
explicit context so as to emphasize their communicative value and relevance