The Miami-Dade Schools Police Department did not immediately return a request for comment from Newsweek.
Alvarez and her husband, Rolando Fuentes, met with lawyers to discuss possible legal action against the Miami-Dade School District and the police.
The child's mother, Mercy Alvarez, said her son doesn't have a mental disorder.
"I was in shock".
According to police at the Coral Way K-8 Center, it all began on the morning of Thursday, January 25.
Details in the police report claim he punched the teacher in the back as they were speaking to another colleague about his behaviour.
The video captures the boy - his hands cuffed behind his back - stepping out of a patrol vehicle and being guided into the Miami Children's Hospital by a uniformed police officer. Someone stepped in to restrain him, but he continued to throw punches and kicks until they both fell to the floor, where he continued to struggle with the educator, the report said.
FOP President Al Palacio said in a news release Monday that while it is unpleasant to "take action" when dealing with a young person, it is "necessary to take appropriate preventative measures to avoid a greater tragedy from possibly occurring in the future".
He allegedly "continued to fight the teacher, grabbing her hair and pulling it towards him", according to the report. The boy's father said, "Says he's a danger to society".
His father said the seven-year-old had apologised but had been left traumatised by what happened. "A danger to society?'".
The Miami Herald said the boy was suspended for 10 days in November because of another school tantrum, but the mother said the same police officer was involved.
Although the teacher did not have any visible injuries, she "stated her back was hurting" and "wanted to press charges", the report said.
With the aid of a translator, Alvarez explained that the issue was not one of a mental instability and that she has had her son evaluated before to which she was told he was okay.
His parents say that the reason for his misbehavior is that he was being bullied at school.
"We believe this officer handled herself as a consummate and caring professional", Palacio said.
According to Miami-Dade Schools police, the action "was warranted to prevent his erratic and violent behavior from bringing further harm to others or himself".