The Traditional Sunday Sermon

How effective is the traditional Sunday Sermon? According to David Sousa, How the Brain Learns (2006), determined what we retain after 24 hours of a teaching episode.

The findings:

5% of lecture
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 we discuss with others
80% of what we experience personally
95% of what we teach to someone else

The book of Hebrews would seem to indicate that all Christians should attain a level of maturity that comes through teaching and not just being listeners.

You have been believers so long now that you ought to be teaching others. Instead, you need someone to teach you again the basic things about God's word. You are like babies who need milk and cannot eat solid food. (Heb. 5:12)nlt 2007.