A.investment B.curriculum C.gains     D.involved    E.s...

问题详情：

A. investment  B. curriculum  C. gains      D. involved     E. scale      F. matters

G. push       H. positive     I. weigh      J. copied       K. attention

Preschool is getting a lot of attention these days. President Obama and mayors across the country are touting（标榜）preschool as an important investment in the economy.

As policymakers _31_ the costs and benefits of “preschool for all,” they’re trying to figure out what actually works in the classroom.

School officials say the system of intensive coaching is a key to classroom success. Boston uses coaches for teachers as part of its larger _32_ for preschool quality. The district has installed a strict _33_ and requires teachers to get masters degrees.

Academics have known for some time that quality _34_, But much of the research has focused on small-scale programs. The Boston program is different.

Last year, a Harvard University study found big _35_ in math and vocabulary in Boston after the program, where the preschool system spans 68 schools.

“That you can develop high quality across 68 schools was not obvious,” says Harvard economist and education professor Richard Murnane, who was not _36_ in the study. “We can do better in preparing poor children for school, and it can be done at considerable _37_.”

But not everyone is sold. Some preschool research shows academic gains disappearing by third grade. Critics say a program without staying power is hardly worth a big public _38_.

“So we just don’t know about Boston, whether the _39_ effects that are talked about at the end of the pre-K year are going to be there at the end of first grade, second grade or third grade,” Whitehurst says. “Without knowing that, it’s hard to make a decision about whether this is a great program that ought to be _40_ in other places.”

But policymakers around the country aren’t waiting for a long-term study. They’re coming to Boston to see the preschool program up close.

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