Education is of vital importance and if your blog is concerned with just that, you are responsible in making the blog as well as the education system appear alluring. You must use the themes which are apt for your blog and do not look out of place.
Some of the themes that will be best suited for your education university sites or portal are:

College Education:

Available in 4 color variation of grey, teal, blue and green this WP theme is a very stylish and has an appreciable set of features. Supporting 2 columns and compatible on IE, Firefox, Opera, Safari, and Chrome this theme consists of 8 HTML pages including the Home page, Blog, Blog detail, News, Gallery, Static, and Contact us. The 8 PSDs included in this theme enables adjustability and editing. The files are in backwards compatible Photoshop CS3 Format.

Dewantara University:

Including JPG Image, Photoshop PSD Graphics Files this WP theme for education blogs comes in red and speaks of simplicity. This theme has certain layout specifications:
Coming in 2 main columns, 940 pixels of content width, 960 pixels of full width, 4 page layout (frontpage, teachers and staffs page, academic page, contact us page), this theme is simple and clean, professional and modern. Using the Arial font type this theme is well layered.

UniversityCollegeSite:
Supporting 2 columns and compatible on IE, Firefox, Chrome, Safari, Opera this WP theme comes in 4 color variations of grey, blue, purple and brown and consists of 8 HTML pages (home, blog, blogpost, news, courses, gallery, static and contact us).