State transportation officials announced Saturday that inspections ordered after a Milton art teacher was fatally struck by a metal cover during Friday’s morning commute found “no major issues’’ with covers and grates on Boston-area highways.

Crews inspected more than 900 covers and grates after Caitlin Clavette, 35 was killed by a storm drain cover that became airborne and crashed into her car on the Southeast Expressway, officials said. The hardware examined included covers for manholes, electrical panels, and sewage drainage systems.

“The inspections found nothing to indicate a threat to public safety, rose to the level of alarming or indicated that any of the structures inspected would be insecure,’’ state Highway Administrator Thomas J. Tinlin said in a statement Saturday.

State Police are trying to determine how the cover launched into the air and struck the windshield of Clavette’s car. Investigators were not releasing new information Saturday about their inquiry, said State Police spokesman David Procopio.

The cover that struck Clavette weighed more than 200 pounds and was located at the edge of the Thomas P. O’Neill Jr. Tunnel in the far left lane, State Police said.

Clavette’s Honda HR-V was in that lane when the cover went into the air, blasted through her vehicle, and came to a rest just outside the tunnel, Procopio said.

Her car continued for about 100 feet before stopping when it scraped a Jersey barrier between the Southeast Expressway and a connector ramp, he said.

The fatality spurred inspections of covers and grates on Interstate 93 from Somerville to Boston and inside tunnels in the metropolitan highway system, Tinlin said.

During the review, inspectors looked at the covers, drove vehicles over them, and struck them with tools to see whether they moved or shifted. Tinlin said “cautionary maintenance’’ work was done at 65 sites. In some cases that included welding, he said.

“At the smallest amount of movement, crews took action in welding covers,’’ he said. “No covers at any of the 919 locations were deemed possible for immediate failure.’’

Crews took no action at 854 sites and there are no plans to perform inspections outside the Boston area, Tinlin said.

He said state transportation workers prioritize public safety.

“On behalf of the workforce, I would like to offer condolences to the family, friends, and students of Caitlin Clavette, who are going through a difficult time in dealing with her loss,’’ Tinlin said.

The manhole cover involved in the fatality was last examined in June 2014 by AECOM, a contractor hired by the state, officials said. At the time, it rated “very good,’’ according to an inspection report.

Transportation officials inspect hardware on the roads in the tunnel system every two years. The state had not received any prior complaints about the cover and no work had been done recently that would have required removing the cover, officials have said.

In Milton, where Clavette began teaching art in the elementary schools in 2011, 40 to 50 parents gathered at the Glover Elementary School Saturday morning to get advice on discussing her death with their children, said Sheila Kukstis, the principal.

One parent who attended was Janet Gilmore, whose 11-year-old daughter, Mia, took art classes with Clavette for four years.

Clavette was an artist and an athlete, who displayed a shadow box in her classroom that included a photo of her running, her number from an athletic competition, and an award, Gilmore said. She also biked competitively and sometimes brought her bicycle to school for students to sketch.

“The kids loved her,’’ Gilmore said. “She blended her passions.’’

She recalled how Clavette spent two days hanging student art for a show at the school, staying so late at night that her mother drove to Glover to bring her dinner.

“She would matte everyone’s work and she would put it up like she was hanging a show at the Museum of Fine Arts,’’ Gilmore said.

Deborah Forestell, who taught with Clavette at Cushing Elementary School in Scituate, said she used art to rate student behavior.

If students behaved well, it was a “Mona Lisa’’ day. If they were naughty, Clavette invoked “The Scream,’’ a painting by Edvard Munch. She used Auguste Rodin’s sculpture “The Thinker’’ to describe mediocre behavior, Forestell said.

“[Students] were always striving to get a ‘Mona Lisa,’ ’’ she said.

Gilmore said Clavette used the same system in Milton.

After school Friday, Gilmore said her daughter and her friends gathered to make valentines and decorate cookies. The children were excited about February school vacation, but when they learned Clavette died, they got quiet, Gilmore said.

“My heart is crushed,’’ she said. “There are a lot really crushed kids right now.’’

Laura Crimaldi can be reached at laura.crimaldi@globe.com. Follow her on Twitter @lauracrimaldi.