This is a quote frequently attributed to William Glasser. It's a development of an original saying by Confuscious. The figures are not based on any verifiable research and the %’s are without any merit. But I do feel that in my role as a trainer and developer the last item rings completely true; 'We learn 95% of what we teach others'.

'We Learn

10% of what we READ

20% of what we HEAR

30% of what we SEE

50% of what we SEE and HEAR

70% of what is DISCUSSED with OTHERS

80% of what is EXPERIENCED PERSONALLY

95% of what we TEACH TO SOMEONE ELSE'

For or a systematic dismantling of this reference the following is worth reading.

http://www.willatworklearning.com/2006/05/people_remember.html