An Area of Concentration

It seems that as I daily go about home schooling my four children, there are times when we focus on a particular area. Now, that's not to say that we don't do our other work. It's just that my teaching time and efforts are geared more toward a particular topic.
Lately, our focus here has been on punctuation and all that it entails...it's a lot! You know, the comma rules, semi-colon vs. colon, underlining vs. apostrophe, and on and on. But, as in other areas, it's good to refresh my memory as I instruct my children. Sometimes it amazes me at how quickly we can forget these basics.
Are you concentrating on an area? I'd love to hear about it!!