Nathan and his younger brother, Brendon, both honed their considerable talents at the school in the late 1990s.
Other notable cricket old boys include Ken Rutherford and Warren Lees.
So the school has a history of producing quality cricketers, and McCullum hopes his cricket academy will help add to that proud record.
"It is something that I've been wanting to do for a while," McCullum said.
"I want to give a little bit back to the school but also get something ready for after cricket.
"You can't play cricket for ever and it is a matter of trying to get something behind me.
"[The school] has been fantastic with helping getting it started, and Gunn and Moore and the Otago Sports Depot have backed me and helped out as well."
Cricket has been kind to McCullum and he is looking forward to passing on some tips.
"It is great to get involved and give some of these guys an early start on some of the things I've learned in my cricket career during the last 10-15 years.
"If I can do that, then maybe they will be 10 or 15 times better than what I and Brendon could have ever been and are.
"To me, that is what it is about - giving back to them."
The academy was launched yesterday and the school's assistant principal, Darin Smith, said the programme was about more than just heading down to the nets.
Pupils will learn about strength and conditioning, nutrition, game strategy and sports psychology as well as the forward defence and slog sweep.
The likes of Brendon McCullum, Craig Cumming, Ian Butler and Neil Broom could all make a cameo appearance.
More than 20 cricketers have signed on for the initial two-week programme and the academy has been "well received"by the community.
"It is exciting where cricket is heading here," Smith said.
"The reception that I've had from the parents has been great."
