The teacher begins with the last sound, which the learners repeat, and then gradually builds up the word or phrase by going 'back' to the beginning.
The following sequence is an example of a backchaining drill:
Teacher: I'd known
Learners: I'd known
Teacher: If only I'd known
Learners: If only I'd known etc
In the classroom
Backchaining is one of many drilling techniques which can be used to focus on pronunciation problems. It is particularly useful to help learners pronounce weak, elided or intrusive sounds. In addition to helping learners say difficult phrases, it is also fun.