The rockets landed in open areas, and there were no reports of injuries or damage.
The al-Quds Brigades, the Islamic Jihad's military wing, claimed responsibility for firing the rockets.
The Qassams were launched while children were making their way to schools and kindergartens. Due to the state of emergency in the area, the children are traveling in fortified buses.
The Sderot parents committee demanded that the Education Ministry keep its promise to hold Monday's civics matriculation exam outside the city.
Batya Katar, chairman of the committee, told Ynet, "In spite of the recent relative calm, many students still fail to come to school. There are classes which are only attended by four or five students."
Katar added that many students said that were unable to study for their matriculation exams inside Sderot due to the situation.
"This calm is a very relative calm, and we knew that it would be followed by additional Qassam rockets," she said.
Palestinian gunmen have recently begun using different methods against Israel from the Gaza Strip. Last Wednesday, mortar shells were fired at the Erez crossing. Several days earlier, four soldiers were injured as mortar shells hit the District Coordination Office at the crossing.
On Saturday, a Palestinian terror cell crossed the border fence and entered Israel at the Kissufim area. Exchanges of fire took place in the area for hours between IDF soldiers and the Palestinian terrorists, after the four terrorists entered an unmanned IDF post. One terrorist was killed, while the other three managed to escape. There were no injuries among the troops.