It seems that ZDNet, back in late 1996, was holding a contest for the release of Sonic Schoolhouse on the PC in which you could win a "Compaq Computer from Sonic," as Sega's official website stated. To win the contest, you had to take a pitifully easy Sonic quiz, along with entering your name, address, etc.
The article also contains a link to another that tells a brief history of Sonic up to that point, but it's likely stuff that most Sonic fans today would already know. It also states a lot of BS about Sonic Schoolhouse, saying that "it's so cool, you won't even know you're learning."
Sonic the Hedgehog learns his ABCs: