"showcase excellence" is correct and usable in written English.
You can use it when you want to point out a notable accomplishment or example of something that is of high quality. For example, "The high school's robotics team showed off their showcase excellence at the competition."
The Guardian Charity Awards aim to showcase excellence among small and medium-sized charities.
The Guardian Charity Awards, in association with Zurich, aim to showcase excellence among small and medium-sized charities.
The aim is to showcase excellence among groups that are too often overshadowed by the voluntary sector's big players.
The award, now in its 10th year, aims to showcase excellence among small and medium-sized charities in the social welfare sector.
With the theme of "Environmental Engineering and Science: At the Nexus," the 2015 conference will showcase excellence in interdisciplinary research and education strategies and technologies at the intersection of diverse disciplines.
Given annually by the Australian Museum, the awards are the most comprehensive Australian science accolades that showcase excellence in research and innovation, leadership, school science, and science communication.
For 15 years, they have showcased excellence among small and medium-sized charities and given a much-needed boost to organisations struggling to get profile and funding to enable them to move forward.
For 22 years, we have showcased excellence among small and medium-sized charities and given a much-needed boost to organisations struggling to get the profile and funding they need to move forward.
This year's award winner, Denise Comer Thompson Writing Programm) showcases excellence in teaching with technology through her recent delivery of a writing MOOC, contributions to various studies to learn more about pedagogical and technological impacts, and continued commitment to creatively and critically exploring innovative approaches to teaching.
The new city museum in Suzhou is a Modernist showcase par excellence, pitched to international consumption.
I want to create a hub to showcase that excellence, and to pay people the industry standard for their work.
