The ideal gift for someone starting high school or college is a new pair of wireless headphones -- and there are now plenty of great choices in this under-$100 range. The Plantronics BackBeat 500 is one of our recent favorites, and it costs just $80.
Moving from wireless to wired headphones: The Sony MDR-7506 headphones are invariably older than the student you're buying them for -- they first debuted in 1991 -- but they're also the best-sounding headphones you can get for under $100.
Amazingly, Amazon's Kindle Paperwhite e-reader is actually more expensive than the Fire tablet. But this $119 unit is often discounted to $99. It's a good choice for bookworms who enjoy distraction-free reading.
Turning to video streaming: There are plenty of Roku models at $50 or less. But in the $100 range you'll find the Roku Premiere+. It's worth the extra cash if you're buying for someone who has a 4K TV with high dynamic range (HDR) video compatibility. But even if they don't, they'll like the Wi-Fi remote (no pointing needed) with a headphone jack for private listening.
Another good gift for outdoorsy scholars: Biolite's $80SolarPanel 5+ is equipped with an internal battery that stores energy from the sun, which means it will keep a charge in reserve for phones and other devices, although tablets will take longer to charge.
If your giftee is budding globetrotter, the Mophie PowerStation Plus is a good travel companion. The $60 external battery charger has an integrated Lightning cable with a micro USB adapter, so it can juice up most mobile devices.
Pioneer's Rayz Rally is a compact plug-and-play Lightning speaker for your iPhone or iOS device that doesn't require charging. It works best as a speakerphone but also can be used for music and boosting the sound during video playback.