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To: Cogito Ergo Sum who wrote (180058)11/6/2021 11:25:11 PM
From: jazzlover2  Respond to of 218070
 
Why sell then if you're so positive about the space?



To: Cogito Ergo Sum who wrote (180058)11/6/2021 11:41:04 PM
From: Cogito Ergo Sum  Read Replies (1) | Respond to of 218070
 
I like profits.. I said I sold Etherium but bought more Bitcoin so net net equal



To: Cogito Ergo Sum who wrote (180058)11/7/2021 1:27:54 AM
From: TobagoJack  Read Replies (2) | Respond to of 218070
 
<<crypto>>

Hilarious, and from behind the pay-wall, re the weaponisation of mathematics

If I put on tin-foil hat, I would have noted that perhaps the mathematics teaching ways are yet another way to bread-&-circus dumb down the serfs so that they willingly go into hock and attend parties at college venues, just so that they graduate and be fed into the furnace of the gods of inflation-driven finance, without the benefit of respectable access to real gold, and if want gold, get bum-rushed into a string of numbers commonly termed crypto

But, as in alas, I cannot find my tin foil head gear today

economist.com

America’s maths warsHow teaching multiplication tables became another victim of the political divide
Nov 6th 2021
AMERICA HAS a maths problem. Its pupils have ranked poorly in international maths exams for decades. In 2018, American 15-year-olds ranked 25th in the OECD, a club of mostly rich countries. American adults ranked fourth-from-last in numeracy when compared with other rich countries. As many as 30% of American adults are comfortable only with simple maths: basic arithmetic, counting, sorting and similar tasks. American employers are desperate for science, technology, engineering and mathematics skills: nuclear engineers, software developers and machinists are in short supply. And while pupils’ maths scores are bad enough now, they could be getting worse. On the National Assessment of Educational Progress (NAEP), a national exam, 13-year-old pupils’ scores dropped five points in 2020 compared with their peers’ in 2012. The status quo does not add up. But teachers and academics cannot agree on where to go next.

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The American maths problem is over a century old, says Alan Schoenfeld of the University of California, Berkeley. In 1890 high school was an elite endeavour: less than 7% of 14-year-olds were enrolled and they were educated in rigorous maths. By the beginning of the second world war, by which time army recruits had to be trained in the maths needed for basic bookkeeping and gunnery, nearly three-quarters of children aged 14-17 attended high school. The cold war sparked a second strategic maths panic in the 1950s. A new maths curriculum, focused on conceptual understanding rather than rote memorising, was developed after the launch of the Sputnik satellite by the Soviet Union. Then that new curriculum was rejected in a move back to basics in the 1970s.

Maths teaching became a worry again when America started to fear being overtaken by Japan. In 1981 the secretary of education appointed a commission to evaluate the curriculum. It produced a report called “A Nation at Risk”. “If an unfriendly foreign power had attempted to impose on America the mediocre educational performance that exists today,” the report reported, “we might well have viewed it as an act of war.”

Since the 1990s, though, maths has become more political. Conservatives typically campaign for classical maths: a focus on algorithms (a set of rules to be followed), memorising (of times tables and algorithmic processes) and teacher-led instruction. Pupils in these classrooms focus on the basics, exploring concepts after obtaining traditional skills, explains Bill Evers of the Independent Institute, a think-tank in Oakland. These methods are familiar to many. For two-digit addition, pupils would be taught a paper-and-pencil method. Add 27 + 45 by stacking 27 over 45. Add up the right column (7 + 5 = 12). Write down the 2, and carry the 1 to the left column. Add up the left column (1 + 2 + 4 = 7). Write down the 7. The answer is 72.

Progressives typically favour a conceptual approach to maths based on problem-solving and gaining number-sense, with less emphasis on algorithms and memorising. In contrast to the conservative strategy, pupils would learn several ways to solve a problem, by using objects and by other means, before learning algorithms. To solve 27 + 45, pupils could add up the digits in the ones place (7+5=12), and then the tens place (20+40=60), and then add them together to get 72. Or they could realise that 27 is 3 digits away from 30. They would add 3 to get to 30. Then add 45 and subtract 3 to get 72. Conceptual maths strategies encourage pupils to find many potential solutions for the same problem to gain number-sense, rather than relying on an algorithm.

Although most teachers agree that maths education in America is sub-par, they have not been able to agree on how to improve it. Copying methods used in highly ranked mathematical nations such as Singapore would be one way. But that would require agreement on what is actually being taught in other countries. According to Mr Evers, successful Asian curriculums reflect the classical position. “What country do you think has totally adopted progressive education and has been a big success? China is very teacher-led. Singapore math is the best in the world. It’s not progressive,” explains Mr Evers. But Mr Schoenfeld reckons countries such as Japan and Singapore implement conceptual curriculums.

Part of the confusion stems from the messy implementation of the most recent maths curriculum, the Common Core. Implemented in 2010 under President Barack Obama’s administration, 41 states and the District of Columbia adopted the principles. Texas, Florida and several others opted out. Despite initially being a bipartisan effort (Jeb Bush and other conservatives supported the Obama administration’s effort), it was eventually criticised by both sides. Some view it as an example of progressive education, while others think it was not progressive enough. Now that test results are rolling in, many conservatives claim that the falling scores show the failure of the Common Core and progressive teachers. But supporters of the current curriculum are not prepared to give up. Whereas NAEP scores declined among 13-year-olds, they stayed steady among nine-year-olds, who would have studied Common Core for their whole school lives.

Further muddling the mess, far-left activists have paired conceptual maths methods with more radical concepts. Many opponents of conceptual maths believe that Common Core, and conceptual maths in general, bans teaching of rote-learning, as in multiplication tables. A prominent maths-education scholar at Stanford University, Jo Boaler, claims that memorising times tables is unnecessary. Conservatives have seized on this idea as an example of liberal activism gone wild. But Mr Schoenfeld claims this does not align with progressive maths values.

Some activists have also paired conceptual maths with “social-justice maths”, the concept that maths should be used to help pupils solve real-world issues and appraise the world around them. Dubbed “woke math[s]” and tagged with headlines such as “In California 2+2=4 May Be Thought Racist” (as a letter to the Wall Street Journal harrumphed), it has done conceptual maths few favours by association.

The maths debate in America is polarised and confused. While other countries implement maths curriculums with a balance of rote and conceptual learning, America continues to swing from one pole to another, decade after decade. Just like the country’s politics, in other words.¦

This article appeared in the United States section of the print edition under the headline "The maths wars"



To: Cogito Ergo Sum who wrote (180058)11/7/2021 3:51:47 AM
From: TobagoJack  Read Replies (2) | Respond to of 218070
 
From behind the pay wall of NYT, giving view to a fascinating debate that all domains should watch but refrain from participating

nytimes.com

California Tries to Close the Gap in Math, but Sets Off a Backlash

Proposed guidelines in the state would de-emphasize calculus, reject the idea that some children are naturally gifted and build a connection to social justice. Critics say math shouldn’t be political.

Nov. 4, 2021


High school juniors and seniors in a precalculus class in San Francisco.Jim Wilson/The New York Times

If everything had gone according to plan, California would have approved new guidelines this month for math education in public schools.

But ever since a draft was opened for public comment in February, the recommendations have set off a fierce debate over not only how to teach math, but also how to solve a problem more intractable than Fermat’s last theorem: closing the racial and socioeconomic disparities in achievement that persist at every level of math education.

The California guidelines, which are not binding, could overhaul the way many school districts approach math instruction. The draft rejected the idea of naturally gifted children, recommended against shifting certain students into accelerated courses in middle school and tried to promote high-level math courses that could serve as alternatives to calculus, like data science or statistics.

The draft also suggested that math should not be colorblind and that teachers could use lessons to explore social justice — for example, by looking out for gender stereotypes in word problems, or applying math concepts to topics like immigration or inequality.

The battle over math comes at a time when education policy, on issues including masks, testing and teaching about racism, has become entangled in bitter partisan debates. The Republican candidate for governor in Virginia, Glenn Youngkin, seized on those issues to help propel him to victory on Tuesday. Now, Republicans are discussing how these education issues can help them in the midterm elections next year.

Even in heavily Democratic California — a state with six million public school students and an outsize influence on textbook publishing nationwide — the draft guidelines encountered scathing criticism, with charges that the framework would inject “woke” politics into a subject that is supposed to be practical and precise.

“People will really go to battle for maths to stay the same,” said Jo Boaler, a professor of education at Stanford University who is working on the revision. “Even parents who hated maths in school will argue to keep it the same for their kids.”

The battle over math pedagogy is a tale as old as multiplication tables. An idea called “new math,” pitched as a more conceptual approach to the subject, had its heyday in the 1960s. About a decade ago, amid debates over the national Common Core standards, many parents bemoaned math exercises that they said seemed to dump line-by-line computation in favor of veritable hieroglyphs.

Today, the battles over the California guidelines are circling around a fundamental question: What, or whom, is math for?

“People will really go to battle for maths to stay the same,” said Jo Boaler, a professor of education at Stanford University who is working on California’s new guidelines.Jim Wilson/The New York Times

Testing results regularly show that math students in the United States are lagging behind those in other industrialized nations. And within the country, there is a persistent racial gap in achievement. According to datafrom the civil rights office of the Education Department, Black students represented about 16 percent of high school students but 8 percent of those enrolled in calculus during the 2015-16 school year. White and Asian students were overrepresented in high-level courses.

“We have a state and nation that hates math and is not doing well with it,” Dr. Boaler said.

Critics of the draft said the authors would punish high achievers by limiting options for gifted programs. An open letter signed by hundreds of Californians working in science and technology described the draft as “an endless river of new pedagogical fads that effectively distort and displace actual math.”

Williamson M. Evers, a senior fellow at the Independent Institute and a former official with the Education Department during the administration of George W. Bush, was one of the authors of the letter and objected to the idea that math could be a tool for social activism.

“I think that’s really not right,” he said in an interview. “Math is math. Two plus two equals four.”

Distress over the draft made it to Fox News. In May, Dr. Boaler’s name and photograph were featured on an episode of “Tucker Carlson Tonight,” an appearance she did not know about until she began receiving nasty letters from strangers.

Like some of the attempted reforms of decades past, the draft of the California guidelines favored a more conceptual approach to learning: more collaborating and problem solving, less memorizing formulas.

It also promoted something called de-tracking, which keeps students together longer instead of separating high achievers into advanced classes before high school.

The San Francisco Unified School District already does something similar. There, middle school math students are not split up but rather take integrated courses meant to build their understanding year by year, though older high school students can still opt into high-level classes like calculus.

Sophia Alemayehu, 16, a high school junior in San Francisco, advanced along that integrated track even though she did not always consider herself a gifted math student. She is now taking advanced calculus.

“In eighth and ninth grade, I had teachers tell me, ‘Oh, you’re actually really good at the material,’” she said. “So it made me think, maybe I’m good at math.”

The model has been in place since 2014, yielding a few years of data on retention and diversity that has been picked over by experts on both sides of the de-tracking debate. And while the data is complicated by numerous variables — a pandemic now among them — those who support San Francisco’s model say it has led to more students, and a more diverse set of students, taking advanced courses, without bringing down high achievers.

“You’ll hear people say that it’s the least common denominator that discourages gifted kids from advancing,” Elizabeth Hull Barnes, the math supervisor for the district, said. “And then it’s like, nope, our data refutes that.”

But Dr. Evers, the former Education Department official, pointed to research suggesting that the data on math achievement in places like San Francisco was more cherry-picked than conclusive. He added that California’s proposed framework could take a more nuanced approach to de-tracking, which he saw as a blunt tool that did not take the needs of individual districts into account.

Other critics of de-tracking say it amounts to a drag on children who would benefit from challenging material — and that it can hurt struggling students who might need more targeted instruction.

Divya Chhabra, a middle school math teacher in Dublin, Calif., said the state should focus more on the quality of instruction by finding or training more certified, experienced teachers.

Without that, she said, students with potential would quickly fall behind, and it would only hurt them further to take away options for advanced learning. “I feel so bad for these students,” she said. “We are cutting the legs of the students to make them equal to those who are not doing well in math.”

Critics of the draft said the authors were punishing high achievers.Jim Wilson/The New York Times

Tracking is part of a larger debate about access to college. Under the current system, students who are not placed in accelerated courses by middle school may never get the opportunity to take calculus, which has long been an informal gatekeeper for acceptance to selective schools.

According to data from the Education Department, calculus is not even offered in most schools that serve a large number of Black and Latino students.

The role of calculus has been a talking point among math educators for years, said Trena Wilkerson, the president of the National Council of Teachers of Mathematics. “If calculus is not the be-all, end-all thing, then we need everyone to understand what the different pathways can be, and how to prepare students for the future,” she said.

California’s recommendations aim to expand the options for high-level math, so that students could take courses in, say, data science or statistics without losing their edge on college applications. (The move requires buy-in from colleges; in recent years, the University of California system has de-emphasized the importance of calculus credits.)

For now, the revision process has reached a sort of interlude: The draft is being revised ahead of another round of public comment, and it will not be until late spring, or maybe summer, that the state’s education board will decide whether to give its stamp of approval.

But even after that, districts will be free to opt out of the state’s recommendations. And in places that opt in, academic outcomes — in the form of test scores, retention rates and college readiness — will add to the stormy sea of data about what kinds of math instruction work best.

In other words, the conversation is far from over.

“We’ve had a really hard time overhauling math instruction in this country,” said Linda Darling-Hammond, the president of California’s board of education. “We cannot ration well-taught, thoughtful mathematics to only a few people. We have to make it widely available. In that sense, I don’t disagree that it’s a social justice issue.”

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To: Cogito Ergo Sum who wrote (180058)11/7/2021 7:34:25 AM
From: Julius Wong  Read Replies (1) | Respond to of 218070
 
I go with stocks: HIVE, MARA, MSTR, SI.