The alleged abuse spanned nearly seven years until last year.
The Wellsford caregivers, approved by the New Zealand government’s Child, Youth and Family service since 2001, were routinely checked by social workers, but the alleged abuse came to light only when one of the boys spoke up last September.
Andrew Hemara, a youth worker, is facing 17 charges of assault and five of wilful ill-treatment
He allegedly ripped an earring from one boy's ear and forced his hand into a fire until it burned, and bent another boy's neck backwards over the metal pole of a bunk bed, the NZ Herald reports.
Yesterday, he said he planned to defend the charges.
Jenny-Lee Hemara is facing 10 assault and three wilful ill-treatment charges after she allegedly threw a metal stool at a 12-year-old boy and stabbed him in the hand with a pen.
CYF northern regional director Grant Bennett said the young boys were unable to alert authorities of what was allegedly happening to them, despite the regular check-ups
The boys are now in the custody of new caregivers.