Michael Waite's superb 169 ensured Wallace High School reached the semi-finals of this year's Schools Cup as they ran out 244 run winners against Friends' School Lisburn.
Waite's century ensured Wallace piled on 327 for 6, with Matthew Halliday also making 86.
RBAI have two sides in the last four with Adam Wylie's five wickets ensuring their first XI had a nine-wicket win against the second string of Campbell College.
Inst second XI are also there as three wickets apiece for Glasgow and McGrath saw them beat BRA by seven wickets - Jack Eagleson making 42.
Campbell College and Methody will battle it out for the remaining semi-final slot.
Meanwhile in the Intermediate Cup, RBAI's Under 15s are the first side through to the semi-finals thanks to a remarkable 236 run opening partnership between Harshit Kokate (126*) and Ben Oberholzer (71*).
Pictured after their stand of 236 are Ben Oberholzer and Harshit Kokate: Pic D O'Neill