He is due back in court next month.
The Herald understands police were alerted after concerns about the boy's behaviour.
His school principal declined to comment, referring inquiries to police.
Police also refused to comment.
It is unknown exactly the nature of the material the boy is alleged to have made or shared.
There have been other unrelated cases appear before the courts since the Christchurch terror attacks.
Christchurch businessman Philip Neville Arps, 44, appeared in court appeared in court last week on charges of distributing footage of one of the mosque shootings.
Arps, who runs an insulation business, faces two charges of distributing the livestream "of the multiple murder victims at the Deans Ave Mosque".
The alleged offending occurred on March 16, the day after the shootings at two Christchurch mosques, in which 50 people died and dozens were injured.
The Chief Censor's office has classified the shooter's live stream and so-called manifesto as objectionable, and under the Films, Video and Publications Classifications Act. The charges have a maximum penalty of 14 years in prison.
Arps was declined bail and remanded in custody until his next appearance on April 15.
An 18-year-old Christchurch student, who has interim name suppression, has also been charged with distributing a livestream and of showing a photograph of the Deans Ave mosque where 42 Muslims were shot dead with the message "target acquired" and further online messaging allegedly inciting extreme violence.
