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Michigan school leaders announced this fall that they were aiming for a wholesale redesign of a system that mostly gets minor adjustments from states: teacher licensing.

Schools chief Michael P. Flanagan has proposed going to a system with three, rather than the current two, tiers of licensing. Moreover, teachers would progress from level to level only by a performance assessment, not the more standard additional courses and workshops. The proposal is part of a sweeping attempt to jack up teacher quality in the Great Lakes State.

鈥淲e think we have to raise the bar on what teachers are expected to do and turn teaching into the profession it is,鈥� said Sally Vaughn, the Michigan education department鈥檚 chief academic officer.

Michigan is not alone in its interest in three-level licensure. In the past few years, Delaware, New Mexico, and Wisconsin have made such a switch, though each with somewhat different aims.

As states explore how to get, keep, and improve the practice of teachers, one popular change has been to do away with lifetime licenses so that state officials can enforce requirements for professional development. A few states, though, are looking to foster bigger improvements through licensing.

New Mexico is a prominent example. In 2003, the legislature enacted changes that included tying minimum salary levels to three teacher classifications. A 鈥減rovisional鈥� teacher can advance to level 2 only after taking part in a mentoring program for beginners and putting in three to five years of successful classroom experience.

Stricter Requirements

Like New Mexico, many states have added mentoring requisites to their licensing systems as a way of ensuring that districts give new teachers help. A smaller number, following the lead of pioneering Connecticut, have set up ways beyond the standard classroom observations to gauge whether a teacher is ready to take on the responsibilities of a classroom.

In New Mexico, for example, in those first five years of teaching, teachers must each submit a 鈥減rofessional-development dossier鈥� that demonstrates to their principals, mentoring teachers, and two independent reviewers that they have the teaching skills identified by the state. Contents may include lesson plans, reflections on teaching, and assessments showing student-learning gains. If a teacher cannot satisfy those requirements, he or she cannot remain.

To go from level 2 to 3 under New Mexico鈥檚 system, teachers must have another three years in the classroom and go through a similar portfolio process, though greater skill is expected. They must also have earned a master鈥檚 degree or advanced certification from the National Board for Professional Teaching Standards.

Level 3 teachers are expected to undertake greater responsibility for professional development in their schools. As in other three-tier systems, New Mexico鈥檚 top level is optional for teachers.

The system is similar to the one Michigan is mulling and to Wisconsin鈥檚, launched 1陆 years ago. But there is also a standout difference: New Mexico, where the state pays the lion鈥檚 share of school costs, attached a minimum-salary level to each classification. Provisional teachers must make at least $30,000, 鈥減rofessional鈥� teachers at least $40,000, and 鈥渕aster鈥� teachers, $50,000.

New Mexico officials say the new system has helped with problems of supply and quality.

鈥淲e鈥檝e basically eradicated those classes with nobody there and unlicensed teachers,鈥� said Eduardo Holguin, the chief legislative lobbyist for the National Education Association-New Mexico. Over the past six years, the proportion of teachers on licensing waivers has dropped from 10 percent to 1 percent, while the number of teachers overall has risen, according to a new report to the New Mexico legislature. In addition, the report says, the share of teachers staying through the first three years has improved, from about two-thirds to three-quarters.

Of the roughly 10 percent of teachers who have tried to change levels so far, passing rates on the dossiers for first-time aspirants are around 85 percent. The state is gathering data to look at the effect of the three-tier system on student performance.

Money Matters

A majority of other states do not have most of the responsibility for salaries, and licensing-system effects will have to be achieved, if at all, without money attached.

Iowa鈥檚 experience shows just how much funding counts. In 2001, the legislature passed a bill specifying a new licensing system that, with four levels, matched pay to four rungs of a so-called career ladder. Another change required new teachers to pass a classroom evaluation within two years to progress to a standard license. Neophytes also had to be enrolled locally in a state-approved mentoring program.

Moreover, the state required that holders of a standard license develop, with their evaluators, individualized professional goals and a plan to meet them. On that rested license renewal.

Before those changes, 鈥渓icensing had not been tied in any way to evaluation of the job鈥� the teacher was doing, said Judy A. Jeffrey, Iowa鈥檚 schools chief.

Those provisions are in effect, but a sharp economic downturn doomed other parts of the system. Under the original plan, for instance, teachers were to get an increase of $10,000 to move from level 2 to level 3. The plan is still on the books, but no work is being done to flesh out the upper two levels of licensure, Ms. Jeffrey said.

One way states have connected pay and licensing is to add a third tier just for teachers who have achieved advanced certification through the national board. In most states, teachers with the credential receive additional pay. In Delaware, Illinois, and Kansas, they go up a notch in licensing, too.

Wisconsin鈥檚 three-tier system, now in its second year, accepts national certification for its 鈥渕aster鈥� level, or candidates can hold a master鈥檚 degree and go through a similar assessment graded by a state-trained team of educators.

鈥淚 think it鈥檚 the best thing we鈥檝e done in a long time in regard to licensing,鈥� said Jim Carlson, a negotiator for local NEA unions in the Sheboygan, Wis., area. 鈥淚t offers a vision of a future for a young teacher, and they are more likely to stay in the business because of it.鈥�

Since Wisconsin teachers move up through providing evidence of their skills, such as videotapes of teaching, licensing is related to classroom endeavors in ways that simply completing courses or workshops is not, he added. Plus, the licensing structure offers district and union officials alike the opportunity to reorient pay scales around such performance.

鈥楢d Hoc鈥� Development

Teacher experts don鈥檛 dislike such licensing reforms, but they leave much undone, they say.

Kate Walsh, the president of the National Council on Teacher Quality, a Washington-based research and advocacy group, pointed out that no existing licensing system assesses teachers with a primary focus on student learning. Nor is that likely to happen until systems are in place that are able to measure a teacher鈥檚 contribution to learning over a number of years, she said.

Linda Darling-Hammond, a Stanford University professor, countered that evaluation methods are much improved over 15 years ago even without that component.

Still, she said, other countries are 鈥渧ery far ahead鈥� of the United States in fostering and recognizing teacher development. 鈥淚f you look across [our] whole nation,鈥� Ms. Darling-Hammond said, 鈥渋t is very ad hoc.鈥�