Low pay, stress and burnout: U.S. schools face severe teacher shortage

Kindergarten teacher Natalie Tran is excited to be back in her Oakland, California, classroom with her 25 4-year-olds. But she's not surprised that many other teachers across the country didn't return for the upcoming school year. 

"We need higher pay," she told CBS News. "We need more respect for the teaching profession because it's extremely difficult, and we really need to have manageable class sizes."

Nationwide, there are at least 280,000 fewer public school teachers than there were before the pandemic, according to the Bureau of Labor Statistics.