Over twenty-five years ago, with four children eight and under, we learned the value of a timer. We began using them to teach our children time management. We would have them do various tasks and set the timer so that they could see how long things take when they really applied themselves.
For example, in setting up their morning routine charts, we would have them run and do each task that was going to be on their chart as we timed them, then when we made the charts, we would put the time that it should take (based on our timing session) in parentheses following each line item on the chart. (This also helped us to know what was reasonable to expect in a certain time period.)