Source: Northwest Staff Development Center News, April, 1979 Vol 1, No. 6
Where was it found? HathiTrust
Search Term: "10% of what we read"
What was found: a reference to William Glasser, and:
"we learn.....
10% of what we read
20% of what we hear
30% of what we see
50% of what we both see and hear
70% of what is discussed with others
80% of what we experience personally (an activity in real life)
95% of what we teach someone else