A 17-year-old mother, her baby, and 5 other members of the family have died from the shooting
School officials searched the child's backpack the day he shot his teacher, but did not find the gun.
The injury to the teacher was considered life-threatening, though she had shown some improvement in the hospital.
Military officials initially suspected he was killed by a fellow soldier in a tragic incident of gun negligence.
The incident, which was in violation of the IDF's open-fire rules of engagement, is being investigated by the Israeli military.
The gunman, who the police said they had 'contact' with in the past, killed himself.
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Six other people were confirmed dead and four were being treated at area hospitals.
The suspect in question will appear before a judge via video link from jail.