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With the completion of new standards intended to reshape science education, the real heavy lifting now begins.

First, states must decide whether to adopt the developed by a coalition of 26 states and several national organizations. Already, though, considerable focus is turning to laying the groundwork for the biggest task of all: bringing the standards to life at the classroom level.

The capacity challenges for states and school districts are immense as they contemplate taking on the new standards, which call for bringing greater depth to science understanding and asking students to apply that knowledge through the practices of scientific inquiry and engineering design.

The standards have major implications for critical levers in the education system, including teacher education and professional development, curriculum and instructional materials, and assessments. Addressing all that will take substantial time and money.

Mindful of the huge task ahead, and the full plates of educators and systems鈥攅specially with most states and thousands of districts still coming to terms with the Common Core State Standards in math and literacy鈥攐rganizers of the standards-development process are preaching a go-slow approach to science.

States should 鈥渉ave the courage to be patient,鈥� said Stephen L. Pruitt, a senior vice president of Achieve, a Washington-based organization that managed the development of all three sets of standards. 鈥淭hey shouldn鈥檛 be rushing to implement the [science] standards. They should do it in their time, and when they鈥檙e ready.鈥�

By moving at a deliberate pace, Mr. Pruitt said, states and districts 鈥渉ave this opportunity to build some capacity and build the right infrastructure for success.鈥�

Coast to Coast

The 26 lead state partners in developing the Next Generation Science Standards have agreed to consider adopting them.

SOURCE: Achieve

One of the biggest issues, experts say, and a costly endeavor, is helping teachers deeply understand the vision for science education espoused by the standards and gain the knowledge and skills to effectively deliver on it.

鈥淭here are more than 3 million teachers of science, a lot of them elementary included in that, who in many ways are going to have to change what they do as they see the standards come on board,鈥� said David L. Evans, the executive director of the National Science Teachers Association, based in Arlington, Va. 鈥淔inding the kinds of professional-development tools that are appropriate at scale is going to be a challenge for all of us.鈥�

A new generation of science assessment tools will also be needed to match the standards.

Initiatives are already underway to support implementation.

The congressionally chartered National Research Council, which crafted a framework to guide creation of the standards, is writing a report to inform the development of aligned assessments.

The NSTA, a partner in producing the standards, has generated some , including webinars, articles, and readers鈥� guides to the standards and the framework. And the standards played a lead role in the NSTA鈥檚 annual conference last month in San Antonio. Also, the group is working with Achieve and states to build a tool to guide states in ensuring that instructional units fit the standards.

In addition, teams from more than 40 states have met periodically since 2011 under an initiative called , with the standards being a core focus.

Peter McLaren, the past president of the Council of State Science Supervisors, which is spearheading that effort, said the next two-day meeting, in June, will focus on key implementation questions: 鈥淗ow is this going to affect the system of assessment, the system of instruction, of professional development?鈥�

Even as Mr. McLaren sees big capacity challenges looming, he also sees great power in states鈥� banding together around common science standards.

鈥淲e can look at models for professional development, and it can be ubiquitous across state lines,鈥� he said. 鈥淚t鈥檚 going to drive the bus in terms of [instructional] materials, in terms of preservice models.鈥�

New professional-development offerings are already emerging. For example, the , being developed with support from a National Science Foundation grant, aims to provide a Web-based system of professional development that allows access to videos, texts, and tools at any time and that has a strong emphasis on demonstrating what a classroom looks like that reflects the standards鈥� vision. Seven states, including Arkansas, California, and Minnesota, will pilot a unit on the physical sciences this year.

Whether the Next Generation Science Standards succeed will depend on the strength of the professional learning opportunities for educators, said Fred B. Ende, the regional science coordinator for the Putnam-Westchester area in New York state. 鈥淭hat to me is really going to be the glue that holds this together.鈥�

鈥楰nowledge in Use鈥�

The new standards were more than three years in the making. What sets them apart from existing state standards, and even those abroad, experts say, is how they weave together three dimensions: disciplinary core ideas; science and engineering practices; and 鈥渃ross-cutting concepts鈥� that span scientific disciplines.

鈥淵ou can travel worldwide and you鈥檙e not going to find standards like them,鈥� said Joseph S. Krajcik, a professor of science education at Michigan State University who served on the 41-member standards-writing team.

At the heart of them is a set of performance expectations that ask students to take actions to show their learning, such as plan and conduct investigations, make observations, analyze data, and devise models.

鈥淚t鈥檚 about knowledge in use,鈥� said Mr. Krajcik. This is a 鈥渄ifferent way of thinking about teaching and learning.鈥�

(Major funding for developing the standards was provided by the Carnegie Corporation of New York. Other funders include the Noyce Foundation. Both foundations help support 澳门跑狗论坛 news coverage.)

The practices are often mentioned as the dimension that may well be the most significant change, and challenge, in classrooms.

鈥淭hat鈥檚 the biggest take-away for my teachers, ... that their instruction will change drastically,鈥� said Diane E. Sanna, the director of curriculum and instruction for the 1,900-student Tiverton district in Rhode Island, where educators have been receiving professional development focused mainly on the NRC framework. 鈥淎 lot of it has to do with the practices.鈥�

Mr. Pruitt of Achieve said the standards also demand deeper knowledge of core concepts, even though they cover less ground.

鈥淭here is going to be a much greater level of content knowledge needed here from both the teachers and the students,鈥� he said. 鈥淭he reason for that is how they use the knowledge. ... Constructing an explanation is not just saying mitosis has four phases.鈥�

Defining 鈥楺uality鈥�

In the elementary grades, the task may be especially tough. Most teachers lack significant background in science and don鈥檛 spend much time teaching the subject.

鈥淭he challenge for elementary schools is probably the most overwhelming because [the federal No Child Left Behind Act] has marginalized science and social studies and everything else that used to be in the elementary curriculum,鈥� said Suzanne M. Wilson, a professor of teacher education at Michigan State University.

Just one-fifth of K-3 educators teach science every day, a recent national survey found. And more than half of elementary teachers said they did not feel 鈥渧ery well prepared鈥� to teach the subject.

Writing last month for the journal Science, Ms. Wilson argued that helping teachers acquire the 鈥渒nowledge, skill, and will鈥� to meet the standards is a 鈥渄aunting enterprise requiring large-scale professional development.鈥�

The professional-development landscape is a 鈥渟morgasboard of opportunities鈥� in which quality varies greatly, she said in an interview. 鈥淭he average teacher in the average American school doesn鈥檛 have access to those really high-quality learning opportunities.鈥�

Overlapping With the Common Core

The science and engineering practices embedded in the new science standards have considerable synergy with the practices and skills promoted in the common-core math and literacy standards.

SOURCES: Next Generation Science Standards; Tina Cheuk, Stanford University

Even the best training may come to naught, she added, if the school culture doesn鈥檛 nurture it.

Designing curriculum and instructional materials that fit the letter and spirit of the standards, especially the integration of the core ideas, practices, and cross-cutting concepts, poses another major challenge.

鈥淲hat we tell people is, if you go to any of the vendors who say, 鈥楾his is NGSS-ready,鈥� stay far away from them, or laugh at them. There鈥檚 no way that could be [true yet],鈥� said Mr. McLaren from the science-supervisors council, who also is a science and technology specialist at the Rhode Island education department. 鈥淚t鈥檚 not as simple as taking a text editor and just putting in the practices and handing it back.鈥�

The NSTA and Achieve are working with states on a tool to gauge the alignment of instructional units.

鈥淲hat this rubric was born out of was the idea of building a better consumer,鈥� said Mr. Pruitt, with the emphasis on identifying a common definition of quality. 鈥淚t鈥檚 very focused on instructional units. This is not for textbook evaluation or daily lessons.鈥�

Analysts say one big adjustment for textbook publishers will be whittling down the huge amount of material typically covered to reflect the standards鈥� call for greater focus on a smaller number of concepts. Meanwhile, the science kits popular at the elementary level will also need to be redesigned to match the standards.

Although publishers don鈥檛 necessarily need to start from scratch, several experts said, they do need to make substantial changes to their offerings and not simply tinker around the edges.

An appendix to the standards drives home the need for 鈥渇ocus鈥� on fewer concepts in depth, as well as 鈥渃oherence鈥� in the curriculum.

鈥淲hat this means to teachers and curriculum developers is the same ideas or details are not covered each year,鈥� it says. 鈥淩ather, a progression of knowledge occurs from grade band to grade band that gives students the opportunity to learn complex material.鈥�

The NRC framework itself has a chapter on implementation. In addressing curriculum matters, it says that 鈥渢he adoption of [the] standards by multiple states may help drive publishers to align with it. Such alignment may at first be superficial, but schools, districts, and states can influence publishers if enough of them are asking for serious alignment.鈥�

Assessment is another looming issue of concern.

A 17-member NRC panel of experts is working on a conceptual framework for science exams and recommendations for developing 鈥渧alid, reliable, and fair assessments.鈥� It will not, however, develop any test items.

"[M]uch of what is needed to effectively assess science learning [in line with the NGSS], either at the classroom level, or for purposes of system monitoring, has yet to be created, ... and the design and implementation challenges are substantial,鈥� writes James W. Pellegrino, the co-chairman of that NRC panel and a professor of the learning sciences at the University of Illinois at Chicago, in an article last month in Science.

At the same time, he identifies some 鈥減romising cases from which to learn and build,鈥� including a recently redesigned National Assessment of Educational Progress in science, the Program for International Student Assessment, or PISA, and revised Advanced Placement courses and exams in biology, chemistry, and physics.

Mr. Pellegrino cautions against moving too quickly. When 鈥渄one poorly,鈥� assessment 鈥渟ends the wrong signals and skews teaching and learning,鈥� he said. 鈥淥ur greatest danger may be a rush to turn the NGSS into sets of assessment tasks for use on high-stakes state accountability tests.鈥�

As for other capacity issues, such as whether technology or science laboratory equipment is adequate, state officials and some experts said that while they are valuable tools in the service of the standards, special investments won鈥檛 necessarily be required. Mr. Kracjik of Michigan State said the standards are 鈥渘eutral鈥� on such matters. That said, the standards may raise questions about uneven access to such resources.

What could hinder movement, of course, is the political landscape. The science standards have been subjected to some , particularly on the handling of the politically sensitive issue of climate change. And the whole concept of common standards has drawn fire from some quarters. Supporters of the common-core standards are defending them against a backlash in several states. (See related story, Page 1.)

None of the lead states in developing the standards had adopted them as of last week, though all have pledged to seriously consider doing so. Some are expected to adopt the standards this year, and a number of non-lead states may well follow suit.

鈥楻eboot Opportunity鈥�

The message to move slowly on implementation of the science standards seems to be resonating with state officials.

鈥淪ome people are still of the mindset of flipping a light switch,鈥� said Matt D. Krehbiel, a science education consultant for the Kansas education department. 鈥淚鈥檝e cautioned, this is an opportunity to think carefully about your system of science education in your district and what needs to be revised, a three- to four-year implementation plan to do this slowly and carefully.鈥�

鈥淎 new standards adoption,鈥� he said, 鈥渋s like a reboot opportunity.鈥�

Mr. McLaren also cites the light-switch metaphor to explain how states and districts should proceed.

鈥淚 don鈥檛 think of a light switch,鈥� he said. 鈥淚 think of a dimmer. The lights will come up slowly, become brighter and brighter.鈥�