I just found this little explanation in support of the use of rhymes etc with young learners and I thought I would share it with you. It was on the Centre For Learning and Literacy site.
The Benefits of Using Rhymes, Finger Plays, and Action Songs
Participating in Finger plays and action songs are another support reading technique that will aid in language development.
Here are some of the benefits of using rhymes, finger play or rhymes and action songs:
-They allow for self expression, encouraging a child's own response in his or her use of body and speech.
-These activities encourage students to participate verbally.
-They provide relaxation (a legitimate opportunity to wiggle and move around).
-They assist the child in learning to follow directions.
-They increase attention span.
-They develop listening skills.
-They teache order and sequence.
-Help teach number concepts.
-They increase manual dexterity and muscular control.