Don't use a cartoon brand mascot to promote a luxury product or highly expensive service.
Yes, many think that branding is only important in fast food and retail operations, but it's extremely important to colleges that have to compete for student tuitions; and it's even gaining importance among high schools, and their surrounding communities, that are vying for prestige to boost neighborhood reputations/value. More successful high schools are now recruiting star athletes and students with high academic achievements, and the school's reputation can either help or hurt those efforts.
The best option is to search for sites that provide the original vector image, or a high resolution bitmap, and then use software like Photoshop or Adobe Illustrator to resize or manipulate the image into your digital scrapbook, or before you print it. If you are on a budget, you can also use free image editors such as Inkscape or the Gimp, although there is also a lot of mid priced software available as shareware.