Some interesting statistics . . .
Average learning retention rates from various instructional modes:
The Learning Pyramid charts the average retention rate for various methods of teaching. These retention percentages represent the results of research conducted by National Training Laboratories in Bethel, Maine.
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/ \
/ \
/ Lecture - 5% \
/ Reading - 10% \
/ Audio Visual - 20% \
/ Demonstration - 30% \
/ Discussion group - 50% \
/ Practice by doing - 75% \
/ Teaching others - 90% \
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Immediate application of learning in a real situation - 90%.
Of what we know we learn approximately...
1% through Taste
2% through Touch
4% through Smell
10% through Hearing
83% through Sight
Of what we learn we retain approximately...
10% of what we Read X1
20% of what we Hear
30% of what we See X1 (We "see" what we read!)
50% of what we Hear And See
70% of what we Say
90% of what we Say As We Do...."
(http://www.hi.is/~joner/eaps/cs_reten.htm -- http://www.nwlink.com/~donclark/hrd/hrdlink.html )