Looking at the current game manual, there is a note that 9th grade students are eligible to compete under specific circumstances:
Anyone enrolled in grade 9 on April 30, 2019 is only eligible to participate on a VEX IQ Challenge team when enrolled in a middle school or district, which includes grade 8, but not grade 10.
How does this impact home-schooled students? My oldest child will be in 9th grade next year and the next child down will be in 7th grade. Would this qualify for that year, or would he be required to move up to the VRC competition? The team would likely also contain children from other families in the same situation.