The country has been gripped by the latest wave of protests.
The videos show them shouting and removing their hijabs.
The group said at least 154 people have been killed.
Iran's schoolgirls are joining in on the anti-government protests over the treatment of women.
Girls in Karaj, a suburb of Iran's capital city Tehran, took off their hijabs to show their support for the movement.
In Saqez, near the country's western border with Iraq, schoolgirls took to the streets and shouted "death to the dictator."
—Shayan Sardarizadeh (@Shayan86) October 4, 2022
—Shayan Sardarizadeh (@Shayan86) October 4, 2022
The girls flashed their middle fingers at the portraits.
According to an analysis by the Institute for the Study of War, students are leading the wave of protests.
The death of a young woman in government custody triggered the current demonstrations.
Iran's so-called morality police arrested Amini for wearing a hijab because they said she violated rules.
Dozens of cities have experienced civil unrest since then. Women have burned their headscarves and cut their hair in a show of defiance while vehicles and police stations have been torched.
Iran has cracked down on protesters brutally. At least 154 people have been killed in the latest wave of protests in Iran, according to the Norway-based Iran Human Rights non-governmental organization.
The US State Department is gravely concerned that the Iranian Government is going to intensify its violent suppression of peaceful protesters who are demanding their rights and dignity.
He said that they were appalled by some of the cracking downs, especially on students.
Business Insider has an article on it.