"There is no reason why our teachers should be trained in separate institutions, " he added.
All teachers should be directed to teach the same lessons from the same textbooks.
Some people think that teachers should be like commissioned salespeople, receiving pay based on end-of-year test scores.
The Taft shooting is the latest incident of gun violence that launched a fiery national debate over whether teachers should be armed.
However, he added that teachers should be given the "respect and trust for their experience and professionalism" to know how to teach these subjects.
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Teaching should be open to anyone with a pulse and a college degree and teachers should be judged after they have started their jobs, not before.
Last year a major report on discipline in schools in England recommended that teachers should be given stronger powers to search pupils for drugs, alcohol and stolen property specifically.
Prospective teachers should be required only to hold a college degree, pass a test of essential skills, and be checked to make sure they do not have a criminal background.
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And even if pupils are not taught about recent history, Mr Lang says that at least teachers should be aware of the background to current affairs and that training should be available.
First adopted into state law in 2010, the evaluation system was hailed as a breakthrough for advocates who argue that teachers should be judged by how much their students learn in the classroom.
Great teachers should be rewarded for great work.
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Effective teachers should be rewarded for student achievement success and move up career ladders, and talented teachers encouraged to work in high poverty schools or in subject areas with teacher shortages through financial (and other) incentives.
Gates wants to see more funding for a National Science Foundation program for math, science and engineering graduates students, and he suggested that at the high school level, math and science teachers should be paid more.
How should teachers be measured, and should those measurements be public?
Information on a school's performance should be available to parents, and teachers' pay should be linked to students' results, he says.
Voters might ask why teachers should not be assessed as other Americans are in their workplaces.
Others in the profession are adamant that teachers should not be to blame.
Russell Hobby, general secretary of the National Association of Head Teachers said teachers should not be made scapegoats for the system.
Teachers should also be aware of pupils voicing opinions drawn from extremist ideologies and narratives and the use of extremist or "hate" terms to exclude others or incite violence.
Teachers say they should be trusted to use their judgement to use a range of techniques suited to their pupils.
Instead of taking on the public sector workers and public school teachers, we should be demanding a better middle class for all Americans.
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There are, of course, countless rubber room anecdotes to bolster the case that there are some teachers who should obviously be fireable and should obviously be fired.
The National Rifle Association, a powerful US lobby group, argues against more regulation, saying teachers in schools should be armed in order to better defend students if a shooting occurs.
But there is no bipartisan consensus on the issue, with others backing the NRA line that teachers in schools should be armed in order to better defend students if a shooting occurs.
Should teachers be treated like professional football players, whose salaries, job security, and other perks are determined almost exclusively based on individual performance metrics, regardless of the quality of their management, stadiums, equipment, coaching, practice facility, the quality and ambition of their fellow players, their level of fan support, age, health, competition, weather, whether they primarily play indoors or outdoors, or sundry other factors that might empirically affect their performance?
But head teachers warned they should not be allowed to "wither on the vine".
Mr Laws said schools currently had one of the best generation of teachers and "we should be willing to acknowledge that".
That's how teachers can determine what they should be doing differently in the classroom.
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