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Do you need both the AGI and IGI test. If you are an AGI does that cover the IGI material? Deciding which test to take so any help would be great.
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The FARs are contradictory regarding the ground instructor ratings, but basically the AGI lets you teach anything except ground training for an instrument rating and a couple others (don't have a FAR/AIM handy). The regs covering the AGI lead you to believe you can teach anything, until you read the regs for the IGI and what training requires it.
If you're getting an AGI/IGI to be eligible for a Gold Seal CFI in the future, either one will work.