I don't know about other organizations- but it is our policy. Yes, any highschool faculty can write the rec but you need the alum signatures. If you do not know any Chi Omega alumni; go to our website and look under alumnae
http://www.chiomega.org/master.cfm-pg=alumnae.htm
Find your state and see the closest alumni chapter to your hometown. Call the contact person and they will do everything they can to help you with a R.I.F. (Recruitment Information Form) and the signatures you need. I know being a senior in highschool- it is hard to do a cold call like that but trust me, trust me, trust me- the person you talk to will be so happy to hear from you and help you beyond belief!!