Wow ..... risky topic to reply to, so I'll state I'm a 4-H coach in NM that has run many USAS, CMP and NRA junior air rifle matches, BUT .... I have limited knowledge to what I am going to have you look into......
Strictly speaking, in terms of a high school scholastic program, from what I can see you are going to be looking at JROTC programs (Army, Navy, & MC ... Air Force does not have the experience yet).
If you look into club programs, you have more choices (rifle/pistol clubs, 4-H, etc)
I would suggest that you first go to the CMP website, and look up the past few years of JROTC Western Region championships .... JROTC collectively, and the separate service regionals. Also, check the other national championships ... American Legion, USAMU, 4-H, CMP JO's, etc
Here is a link to get you started:
http://clubs.odcmp.com/cgi-bin/matchRes ... nation=AIR
I know of only a few JROTC programs in my area that will work with a shooter before high school .... and then it is mostly summer shooting camps they will have .... MAYBE if they have some jr-high students in their district too. Here in NM, they have to be kinda careful as they are an "activity" under the NM activities association.
The High School JROTC programs have been extremely helpful to the 4-H program that I run. Summer camps, experienced coach camps are held a few times per year and kids from all over are welcome to attend these .... usually it's first come first served.
The CMP and NRA summer camps are superb as well.
You may find that going with an established "club" program is better in terms of logistics ... If I had the cash to spend and send my girls off every once in a while, there are some EXCELLENT club coaches in Colorado clubs ... same in Washington
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OK all that said .... why not coach her yourself? There is a Level-1 Rifle camp coming up at the end of Sept at Camp Perry. (Sept 23 & 24)
http://www.nrahq.org/education/training ... chools.asp ... then stay for the coach conference over the weekend.
If she is 15+, bring her to the camp for two reasons ... 1) She can be the primary training "dummy" and 2) She will become a "Junior Rifle Trainer"
Sure you'll have information overflow, but this sport needs coaches for all the disciplines. Don't worry about being a "beginner" coach ... those previously mentioned summer camps are what we are handing our kids "up" to.....