Campaign aides said Mrs. Clinton planned to use Monday’s speech to present her overall assessment of the economy. She will delve more deeply into specifics, including her plans to change the tax code, regulate Wall Street and curb corporations’ emphasis on short-term profits rather than long-term investment in employees, in a series of future speeches, they said.

It remains to be seen whether Mrs. Clinton’s emphasis on wage growth to alleviate income inequality will be enough to allay growing concerns over economic disparity. In a New York Times/CBS News poll conducted in late May, two-thirds of Americans said they thought the distribution of money and wealth in this country should be more even.

Two of Mrs. Clinton’s opponents for the Democratic presidential nomination, Mr. Sanders and former Gov. Martin O’Malley of Maryland, are trying to appeal to liberals concerned that Mrs. Clinton will not go far enough in addressing inequality and that her $200,000 paid speeches to Wall Street have made her overly cozy with the top 1 percent.

Both Mr. Sanders and Mr. O’Malley met with the teachers’ union. At her meeting, Mrs. Clinton said teachers shouldn’t be the “scapegoat” for society’s ills — an acknowledgment that education policy remains one of the few areas of unsettled debate within the Democratic Party. President Obama’s education agenda has often infuriated teachers’ unions, and last year the head of the National Education Association, another union representing teachers, called for the secretary of education, Arne Duncan, to be fired.

Months ago, Ms. O’Leary, an adviser to Mrs. Clinton, said the candidate would listen to both sides in the education debate. In a statement after the endorsement from the American Federation of Teachers, Mrs. Clinton said that teachers’ voices “and voices of all workers are essential to this country.”