Is Peter Preaching At Pentecost An Example Of Sermonizing?

My friend James has been looking at the events surrounding Pentecost and Peter proclaiming the Gospel to the crowds. The question at hand in a larger context is this: are sermons something we find example/command for in Scripture. Was Peter given a sermon or was this an impromptu exposition? James takes a great deal of care in his examination, I think you will enjoy reading and interacting with his series.

Here is the entire series for your reading pleasue....

1. Peter the Pulpit Preacher: Intro – Part 1
2. Peter the Pulpit Preacher: Obedience – Part 2
3. Peter the Pulpit Preacher: Systematic or Consistent? – Part 3
4. Peter the Pulpit Preacher: Worth dying for – Part 4a
5. Peter the Pulpit Preacher: Worth dying for – Part 4b
6. Peter the Pulpit Preacher: Summary and Conclusion – Part 5