Here's a quick theory lesson on the topic of bars, counting and chord charts.

It's taken from Musicademy's Beginning Worship Guitar Course.
http://www.musicademy.com/store/uk/christian-guitar/guitar-downloads/new-beginning-worship-guitar.html

If you'd prefer a much meatier music theory course, check out the Playing By Ear and Understanding Chords DVDs.

http://www.musicademy.com/store/uk/playing-by-ear/play-by-ear.html

For instant access to ALL Musicademy's 1,200 worship training videos head over to our online video streaming subscription site https://www.musicademy.com/training