add on because you are adding an advanced rating to a ground instructor certificate.
I already have the IGI certificate.
Having just passed the AGI written test, when filling out IACRA for that, is the AGI considered an add-on to my IGI, or is it an original issuance?
How was the test? What'd you use to study?
Used King Schools course to study. A bit dated and corny but, at least for me, effective. Take the AGI and FIA (flight instructor airplane) at the same time as they are basically the same test from what I've heard.