Ok, a couple people seem to want to work on their strumming. Since I am too lazy to separate out just the relevant stuff and put it in a separate document I'll just post a link to my entire Level 1A rock rhythm guitar PDF and refer you to the relevant pages. My methodology for teaching open chords and strumming is that we focus almost entirely on the left hand chord shapes at first, and while we learn those we work on keeping a nice steady pulse with quarter note downstrokes. If you look at page 5 of the PDF (your reader will probably call it page 6 as it counts the title page) I have a bunch of charts for chords that you probably already know, and then a bunch of progressions. I have midi jam tracks for each of those progressions which you guys probably don't need but I suppose I can upload them if anyone wants. Once again they are practiced, for starters, with quarter note downstrums only.
On Page 6 there are a couple more chords and another progression, and then a basic explanation of time and specifically eighth notes... strumming is basically all about 8th notes. There's a little exercise where you mute the strings and practice the basic motion... downstums on the downbeat, upstrums on the upbeat.
The real meat starts on page 7. It's very simple: for each of the tables, strum where there is an X, skip where there is not. It starts with the simplest way to create patterns which is leaving out upbeats. At first I recommend just sitting on one chord, preferably a six string chord like E or G so we don't have to worry about accuracy. Or you can just mute the strings if you want. Ideally the student will practice with a metronome and ALWAYS tap a foot. Then you can graduate to playing each pattern with the progressions on the previous two pages or your own if you prefer. remember that when you are NOT playing an upstrum on a given upbeat your picking hand still performs an upward stumming motion... you just miss the strings. I provide five, and leave space to create four of your own.
On page 8 we introduce patterns in which downbeats are not strummed. This is harder but you'll get a lot of mileage out of it, especially patterns that leave out the downbeat of three. There are some create your own examples, with the caveat that the first beat should (for now at least) always be strummed. Once again start out practicing each pattern on one chord or with muted strings, then graduate to progressions. The metronome is your friend.
Page nine is where we leave out both some downstrokes AND upstrokes. I give one example and the rest are create your own. Same rules apply as before.
This PDF is obviously not for self-instruction. If anyone is curious to know what the hell I'm doing with any of the other stuff in here don't hesitate to ask...
https://drive.google.com/open?id=0B6W7z ... Wxwd2xFa1U