PELHAM, N.Y. — In the month since Pelham Memorial High School in Westchester County advertised seven teaching jobs, it has been flooded with 3,010 applications from candidates as far away as California. The Port Washington District on Long Island is sorting through 3,620 applications for eight positions — the largest pool the superintendent has seen in his 41-year career.

Even hard-to-fill specialties are no longer so hard to fill. Jericho, N.Y., has 963 people to choose from for five spots in special education, more than twice as many as in past years. In Connecticut, chemistry and physics jobs in Hartford that normally attract no more than 5 candidates have 110 and 51, respectively.

The recession seems to have penetrated a profession long seen as recession-proof. Superintendents, education professors and people seeking work say teachers are facing the worst job market since the Great Depression. Amid state and local budget cuts, cash-poor urban districts like New York City and Los Angeles, which once hired thousands of young people every spring, have taken down the help-wanted signs.

Even upscale suburban districts are preparing for huge levels of layoffs. School officials and union leaders estimate that more than 150,000 teachers nationwide could lose their jobs next year, far more than any other time, including the last major financial crisis of the 1970s.