Brett,

 

You might take a look at this article...

http://www.chesscafe.com/text/skittles150.pdf

 

I really don't think that anyone with a life could follow this program exactly as he has it laid out, but the concept here matches what I have read on the internet  from countless coaches for U1600 players.

 

Also, there is a wealth of information from Dan Heisman written in plain language at.. http://www.chesscafe.com/archives/archives.htm#Novice%20Nook.  In many of his articles, Dan endorses study plans similar to the one in the article above.. for example, http://www.chesscafe.com/text/heisman04.pdf.

 

These articles are short enough that you should be able to get your kids to read an article a week or something like that and discuss the material together.


Disclaimer: I am fairly low rated and have never taught H.S. students myself so take what I have said with a grain of salt.