JACKSONVILLE, Fla. -- Teachers and students across the state of Florida are trying to come up with ways to make up for lost days because of Hurricanes Charley, Frances and Ivan.

Statewide, school districts canceled a total of 338 days because of the storms.

In Duval County, officials are making up four lost school days by giving up some teacher planning days and holidays from October through February.

Jacksonville public schools will be holding classes on days they were on the calendar to be days off for students:

Oct. 11 (formally a teacher's planning day)

Nov. 11 (Veteran's Day)

Jan. 3 (formally a teacher's planning day)

Feb. 21 (President's Day)

Earlier this week, Florida Gov. Jeb Bush signed an executive order allowing school districts closed for more than five days by hurricanes to delay the Florida Comprehensive Assessment Test.

Those districts might also be allowed a shorter school year. The only school system in northeast Florida closed more than a week was Flagler County.

But the governor also said the schools will still be graded and standards will not be lowered.

"Our goal is to ensure that students receive a full year's worth of instruction while easing the burden on school districts struggling to meet that obligation," Bush said.

Bush said the FCAT could be pushed back a week for districts that lost more than five days to the recent hurricanes.

Bush said school systems that lost 11 days or more will have an extra two weeks.

Several counties in the direct path of hurricanes lost 13 or more days, and many in the Panhandle have not even recovered to the point they've announced when they will reopen.

"One month ago yesterday, I signed an executive order in the wake of Hurricane Charley, granting flexibility to school districts," Bush said Tuesday. "Today, in the wake of not only Charley, but Frances and Ivan, I am pleased to continue working to address the needs of school districts in these difficult days."

By state law, the school year is 180 days. On average, districts build 27 extra days into their school calendars.

Districts that lost five days or fewer will be expected to make up the lost days from teacher planning or school vacation days.

The governor says districts that lost more than five days will be able to seek waivers of the 180-day requirement.

Duval County teachers are also trying to catch up after losing four days of school.

"With accountability required as it is, we do want to be accountable to all of our students," explained Principal Margaret Walker at Fort Caroline Middle School.

At the school, students are let out early one day a week every other week. During that extra 75 minutes, teachers meet to discuss improving the classroom.

They meet to go over test grades and to brainstorm about improving the school as a whole.

A lesson plan is required for each early-release day, and now teachers must double up during their next meeting to make up for lost time.

"Schools are being put under demands that we were not being put under in the past, so this time really affords us the opportunity to brainstorm about how we can meet every need," said fourth-grade teacher Katrina Barr.