Elite Jack!!

The story is set at the elite Omega High School, where test results decide everything. The high-scorers in the student council, in particular the student council president, have a lot of authority. Yuria Aikawa comes to this school, and though she seems like an ordinary girl who loves fun things and her boyfriend Shuri, she's actually a super-genius who gets the top score on every test. She becomes student council president and tries to make school life more fun in various ways.

(Source: ANN)

Included one-shot:
Volume 1: Monster Land☆