Some public school districts in Florida have canceled outdoor activities during Monday's solar eclipse across the U.S. for what they say are safety reasons.

Public schools in Lake, Marion and Manatee counties have moved all outdoor activities inside during the eclipse, from 1:30 to 4:30 p.m. Monday.

Marion County elementary school dismissal takes place during the three-hour timeframe. After 4:30 p.m. outdoor activities will resume, the district said.

In a news release, the county said students can safely view the solar eclipse on appropriate television channels or online.

Parents tweeted to the Marion superintendent asking whether students will be released at the regular time. Dr. Heidi Maier said regular dismissal times still apply.

School staff and bus drivers will remind students not to look directly at the eclipse.

Lake County Schools said with principal approval, teachers may use approved eyewear, but parents need to send a note by this Friday if they don't want their children to participate.

On its Facebook page, the district said students who are absent Monday or check out early will be allowed to make up missed assignments.

Manatee County schools in the Tampa Bay area also has moved outdoor activities inside between 1 p.m. and 4:30 p.m. Activities include physical education, recess, athletic practices, band practices and after-care programs, the district said.

Principals and staff will hold bus and car riders indoors until their buses or cars arrive. Outdoor activities will be allowed to resume after 4:30 p.m.

“Making a decision on how to best handle the upcoming solar eclipse was extremely difficult because we recognize both its historic and educational aspects,” Manatee Superintendent Dr. Diana Greene said in a statement. “However, our first and foremost priority is the safety of our students. Because we have more than 49,000 students and we cannot assure that all of them will have the proper eye equipment to safely watch the eclipse, we are coming down on the side of safety as outlined in our Student Safety Advisory for the Solar Eclipse."

A handful of public libraries in Central Florida have been issuing free, approved safety glasses. In Flagler County, Tuesday was the last day they were giving them out, and they were almost gone. In Orange, participants had to pre-register for an eclipse program, which came with free glasses.

In Seminole, the Casselberry public library branch planned to hand out numbers to people at 8:30 a.m., and by 9 a.m., it will call out numbers and hand out 175 glasses. Other locations planned to give them out at 9 a.m. on a first-come, first-serve basis.

The Orlando Science Center is also holding an eclipse viewing party. There, you can view the solar eclipse with special glasses or using solar telescope filters.