Trainers and facilitators need to remember these numbers:
90, 20, 8, 6.
90 minutes is the ideal chunk of time for participants can learn and understand
20 minutes is how long participants can listen and retain information
8 minutes is the length of time you can talk for before before they stop listening. We are trained to focus for just eight minutes due to decades of TV watching, where ad breaks occur approximately every eight to ten minutes.
6 is the ideal number of times to present information to make sure a learner remembers the content.