system
Given the following post, respond as if you're commenting on Reddit:
human
[Starship Troopers]At the start of the movie contact with the bugs was fairly limited. How did the Federation get enough Giant Bug larvae to supply them for high school science class dissections?

Making them available for a typical school implies that they have a vast supply of them.  You would think that the larvae of bugs transported across the galaxy and taken from a highly hostile species would be difficult, the Federation had never engaged in planet side combat by this point in Starship Troopers so it boggles the mind how they even got them.  So how are they getting Bug larvae on an almost industrial scale?
gpt
The federation had limited colonization efforts near the arachnid quarantine zone. There was also at least one non federation human colony inside arachnid space. The arachnids weren't overtly hostile to human presence at least initially and exotic zoology would make a fine export for a fledgling colony that isn't mining or farming and needs to import supplies. 

Aside from that the bug they were dissecting is relatively harmless beyond burrowing and maybe swarming over a person. Breeding a population to understand bug biology and eventually using it for propaganda purposes makes sense. The point isn't to teach school children how bug anatomy works its to teach them that bugs can die and where the most lethal areas to hit are. You start with the relatively disgusting but harmless drones so by the time they see the warriors it's less of a shock to them.