JACKSONVILLE, Fla. -

As Tropical Storm Isaac spins closer to Florida, parents are watching the storm, trying to know if and when it will be safe to send their children to school.

Duval, Clay and St. Johns county schools may be cancelled if Isaac heads for Jacksonville. Until the coast is clear, all three counties will be working closely with the Emergency Operation Center to plan accordingly.

According to Jill Johnson, with Duval County Public Schools (DCPS) there are many factors that play into deciding whether or not to cancel class.

"If you are going to be telling someone to evacuate, it's a good indicator on whether or not there's going to be school," said Johnson.

An automatic call system is put in place to reach parents if school is canceled. Currently 25 schools in Duval County act as shelters in emergency situations.

DCPS has even added an additional five days to its schedule to act as "storm days" this year. That means when bad whether hits, Duval Schools can close without students having to make up the days at the end of the school year. If the storm days aren't used, the district will use them as vacation days.