ISIS bans math, social studies for children

Instead, they'll be subjected to the teachings of the radical Islamist group. And any teacher who dares to break the rules "will be punished."

ISIS revealed its new educational demands in fliers posted on billboards and on street poles. The Sunni militant group has captured a slew of Syrian and Iraqi cities in recent months as it tries to establish a caliphate, or Islamic state, spanning Sunni parts of both countries.

In the letter, ISIS said alternative courses will be added.

It also said teachers must erase the phrase Syrian Arab Republic -- the official name of Syria -- and replace it with Islamic State, which is what ISIS calls itself.

Educators cannot teach nationalistic and ethnic ideology and must instead teach "the belonging to Islam ... and to denounce infidelity and infidels."

Books cannot include any reference to evolution. And teachers must say that the laws of physics and chemistry "are due to Allah's rules and laws."

The letter ends with a firm warning:

"This is an obligatory announcement, and all violators will be punished."

200 Syrians killed in one day

The brutal advances of ISIS in Syria come as the country grapples with a three-year civil war with no clear victor in sight.

At least 200 people were killed on Tuesday alone, the opposition group Syrian Observatory for Human Rights said. It said about 60 were killed by regime airstrikes.

The state-run Syrian Arab News Agency, meanwhile, said terrorist attacks in Damascus, Hama and Homs left at least three civilians dead.

In all, the United Nations estimates more than 190,000 people have died in the violence between President Bashar al-Assad's regime and rebels seeking an end to four decades of al-Assad family rule.