"To attend the academy" means to enroll or participate in a specific educational institution or training program, which is commonly called an academy. Full definition
That system is one where 40 per cent of state - educated children attend academies, more than half of them in academy chains. (schoolsweek.co.uk)
Some teachers described the kitchen workers as «role models» for the boys who attend the academy and take three meals a day there. (theslowcook.com)
As would be expected from this, parents went on to report that they would like more information about academy schools, especially those parents with children already attending an academy. (thenferblog.org)