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Showing posts with label Science. Show all posts
Showing posts with label Science. Show all posts

Friday, September 10, 2010

Effective ELL Science Intervention

My son read this article and said I was ahead of my time yet again. Fifteen years ago, I spent an important chunk of my career as the middle school science teacher in an international school whose students were 49% ELL. Although none, not one of the ELLs, spoke Spanish, they spoke many other languages, mostly East Asian languages. I quickly realized the old, time-tested sequence of “read the textbook, do a few labs, test the material” would not work. I created several interventions, all of which leveraged the native speaking skills of peers.

First, I started every unit with a series of labs, an intervention similar to having "students initially observe the process of osmosis with a tea bag and water" as the opener to a lesson about osmosis. Each lab team consisted of one native speaker and one ELL. The effect was that students gained experiential understanding of new vocabulary or schema before they encountered the vocabulary in printed form. Schema is the set of experience that informs comprehension. It is the frame of reference. For example, I would venture to guess that if you do not possess the schema of engineer, this sentence is gobbledygook, "A duct-less split can produce the exact amount of energy needed to temper an envelope.”* Developing schema is crucial to first language acquisition and just as important in second language acquisition.

Second, I adapted a primary school literacy program for use in my science class. The program came from Johns Hopkins University with the acronym CIRC (Cooperative Integrated Reading and Composition). I used my science text as a "basal reader" to create "Treasure Hunts" and other CIRC-based materials. Every student, even the native speakers, used these materials.

(The original design of CIRC provided templates for teachers to adapt their own school-adopted texts. It was later found that teachers lacked the will or the ability to create their own adaptations, so CIRC was reincarnated as the now-famous Success For All program. Today, teachers complain about expensive, scripted curriculum, but they did not take advantage of inexpensive, non-scripted curriculum when they had the chance. The creators of CIRC had no original intention of usurping teacher autonomy).

Third, I had students read their text aloud in class CIRC-style. Each lab team sat with their chairs next to each other and facing opposite directions so that the right ear of one student was close to the right ear of the partner. Each native speaker read one paragraph to their ELL partner, and then the ELL student read the same paragraph to their native speaking partner. The native speaking partner would supply words or correct pronunciation as needed. The team then repeated the process with the second and subsequent paragraphs. Thus, no student was a passive listener. At any moment, half of the students were reading aloud, and half were actively listening, either as ELLs preparing to read the same paragraph, or as native-speakers assisting their ELL partners.

Researchers say that the most valuable education research comes from teachers testing strategies in their own classrooms and reflecting on the results. However, when teachers report their own classroom research, it is often denigrated as being merely anecdotal or lacking sufficient sample size. Whatever. I am going to go ahead and report my results.

I gave the same unit tests to all students, native speakers and ELL students alike. Every single ELL student passed the tests, sometimes exceeding their own expectations. Even more remarkable, the native speakers' achievement skyrocketed. I was appalled to find that in the past I had denied native speaking students such high levels of achievement. The interventions worked so well with the first unit that they became my standard operating procedure ever after.

* Example from Marilee Sprenger, "Teaching the Critical Vocabulary of the Common Core"

Sunday, January 24, 2010

Book Review: The Language of God by Dr. Francis Collins

Book Review: Francis S. Collins The Language of God: A Scientist Presents Evidence for Belief. 2006. New York: Simon & Schuster, Inc.


The science curriculum is the battleground for one clash after another over creation and evolution. Nearly every school board must engage the issue; it is only a matter of when. If they exclude creationism, they risk alienating parents. Most school boards opt for a consider-all-sides approach which pleases no one. Creationists object to what they perceive as an attack on God. Evolutionists object to the inclusion of creationism on any terms because creationism is not science. Declaring, “No serious biologist today doubts the theory of evolution,” Dr. Collins comes down firmly on the side of evolutionists, and fervently wishes certain Christians had not packed the word “creationist” with so much unnecessary baggage.

While finishing up a doctorate in physics, Dr. Collins changed his major, earning a doctorate in biology and becoming a physician. His ideas incubated in both sterile laboratories and the social messiness of the hospital. He is a committed Christian who believes a “satisfying harmony” is not only possible, but preferable. As an unimpeachable scientist, his views may help peace break out.

When Dr. Francis Collins stood with President Clinton before cameras and microphones, the president said of the Human Genome Project, “today we are learning the language in which God created life.” Dr. Collins seconded, adding, “...we have caught the first glimpse of our own instruction book, previously known only to God.”

Presidents invoke god all the time for political purposes. But a world-renown scientist? It turns out Dr. Collins is in good company. In a 1997 survey, 40% of his colleagues in biology, physics and mathematics professed belief in a God “who actively communicates with humankind and to whom one may pray in expectation of receiving an answer.” It is common knowledge that 40% of Americans consider themselves Christians. Belief in a personal God is as common among scientists as the general population.

Dr. Collins asks, “Is there still the possibility of a richly satisfying harmony between the scientific and the spiritual worldviews?” He wrote this book to explain why he believes the answer is a “resounding yes!”

Very few scientists have the status to address the question. Other scientists have attempted only to be dismissed as intellectually dishonest or worse. Dr. Collins establishes a ground rule, “Science is the only reliable way to understand the natural world...”

Dr. Collins was raised with an apathetic attitude toward religion, first identifying himself as agnostic, and then under the influence of university, turned to atheism. He became convinced, along with 60% of his colleagues, that “everything in the universe could be explained on the basis of equations and physical principles,” concluding that “no thinking scientist could seriously entertain the possibility of God without committing some sort of intellectual suicide.”

Eventually, he realized his atheism was based on weak “school boy” constructs. As a scientist, he determined to seriously investigate God. A Methodist minister suggested he read Mere Christianity by C.S. Lewis. The book changed his life. He could not escape the implications of “right and wrong as a clue to the meaning of the universe.” He considered sociobiology's postulate that what we call morality developed to aid biological survival. Yet the theory could not account for sacrificial altruism, someone who willingly gives on behalf of someone else, with no foreseeable benefit to the giver. The argument that altruism provides indirect evolutionary benefit did not stand up to scrutiny. From there he boarded a logic train and, as he stopped at station after station, he arrived at a place where “faith in God now seemed more rational than disbelief,” throwing him into a quandary. He paced the landing platform. “It seemed impossible either to go forward or turn back.” Finally, he took a leap of faith and thereby started an inner “war of worldviews.”

His inner war occurs on at least four battlegrounds, the same fields of doubt all of us have crossed at one time or another.
1. Isn't the idea of God just wish fulfillment?
2. What about all the harm done in the name of religion?
3. Why would a loving God allow suffering in the world?
4. Can a rational person believe in miracles?

Dr. Collins struggles as we do, as laymen on the same spiritual path, struggling with the same issues. He does not stand, as theologians and generals are wont to do, on a hill overlooking the battlegrounds. He shares the trenches with us, his readers.

We laymen are awed by the starry night sky, the intricate dance of the honey bee, or the blooming of a rose, and suspect the Psalmist may be right that “creation displays the handiwork of God.” But what awed Dr. Collins was the elegant beauty and simplicity of mathematical representations of physical phenomenon. He wonders, “Are these mathematical descriptions of reality signposts to some greater intelligence? Is mathematics, along with DNA, another language of God's?”

First, Dr. Collins establishes a miracle as a “singular, exceedingly improbable, and profound event in history” that science is incapable of explaining. Then he considers the Big Bang and the question science has been unable to answer, “What came before the Big Bang?” Considering it more than a creationist gotcha question, Dr. Collins agrees with astrophysicist Robert Jastrow, “Now we see how the astronomical evidence leads to a biblical view of the origin of the world...the chain of events leading to man commenced suddenly and sharply at a definite moment in time, in a flash of light and energy.”

Dr, Collins demonstrates that the big guns, including among others, Stephen Jay Gould, Steven Hawking and Albert Einstein, firmly established “the existence of a universe as we know it rest upon a knife edge of improbability...our universe is uniquely tuned to give rise to humans.” Then he surveys the present state of scientific knowledge in physics, biology, chemistry. He makes a point that bears frequent repeating. If there is a God and “if God is truly Almighty, He will hardly be threatened by our puny efforts to understand the workings of His natural world.” When believers act if they must defend God they make God small indeed.

The corollary of improbability, “the God of the Gaps,” is a dangerous shoal for the ship of faith. If the gap is filled, where does that leave God? One tempting gap is the origin-of-life gap “given that no serious scientist would currently claim that a naturalistic explanation for the origin of life is at hand.” Another is the “woefully incomplete” timeline of the fossil record. Nevertheless, implications of the Human Genome Project, which he headed, makes a common ancestor a virtually inescapable conclusion.

The book is powerful if not original. Many authors have proposed a similar harmony of science and faith. In fact, Dr. Collins quotes some of them. Critics have a field day with many of these other authors, on the grounds that they are not true scientists, or if they are, they must be bad scientists. Dr. Collins' credentials are impeccable. He is well-armored against the spear of idiocy flung so carelessly at other scientists who have attempted to make many of the same points.

After making the case for evolution, Dr. Collins sympathetically refutes three current options in chapters every parent and school board should read:
1. Atheism and Agnosticism
2. Creationism
3. Intelligent Design

He proposes a fourth option he calls “BioLogos,” science and faith in harmony, concluding, “[God] can be worshiped in the cathedral or in the laboratory. His creation is majestic, awesome, intricate,and beautiful---and it cannot be at war with itself. Only we imperfect humans can start such battles. And only we can end them.”

Finally, Dr. Collins bears his heart in an account of his own spiritual journey and personalized messages to believers and nonbelievers. In an appendix, he explores several current ethical dilemmas in science, and again argues that the very existence of these perplexing dilemmas indicates the universality of the moral law. For him, a harmony of science and faith is essential to optimal resolution of these dilemmas and any others that may come later.

Sunday, September 27, 2009

“Learning Science vs. Doing Science”

In March 2009 Texas adopted new standards for science education. High school students are expected to

In all fields of science, analyze, evaluate, and critique scientific explanations by using empirical evidence, logical reasoning, and experimental and observational testing, including examining all sides of scientific evidence of those scientific explanations, so as to encourage critical thinking by the student.


So far, so good. The statement includes all the necessary buzz-words, so no problem, right? Wait, hold the phone, not so fast, says Jonathan Osborne, the chair of science education at Stanford University in this commentary on EdWeek.

As I read what Mr Osborne had to say, I kept getting distracted. Every so often I found myself checking to see if I had not experienced a serious transporter malfunction. Like when I read this statement:

Science education seeks to offer students an understanding and vision of a body of knowledge that is beyond question.


Really? "A body of knowledge that is beyond question"? How did I get from EDWeek to the Onion? But no, I am still on EdWeek. Then I read this:

After all, the stock in trade of the school classroom is knowledge that has been placed beyond doubt.


Huh. I stopped reading and started scrolling. Surely there has to be a snark tag somewhere. No snark tag? This is a serious commentary? So I found my place again and continued reading. Oh, now I get it. He thinks science learning is distinct from science doing. It turns out that Dr. Osborne considers the seemingly innocuous statement "critique scientific explanations" to be code.

Let's look at the statement again.

In all fields of science, analyze, evaluate, and critique scientific explanations (my bold) by using empirical evidence, logical reasoning, and experimental and observational testing, including examining all sides of scientific evidence of those scientific explanations, so as to encourage critical thinking by the student.


According to Dr. Osborne, the phrase “scientific explanations” is code for “evolution.”

The political intent is evident. There is only one theory that the supporters of this view wish to see analyzed and critiqued


Is he sure the writers of the standards really have only one theory in mind? Perhaps we can draw some conclusions from definitions of terms repeated throughout the Texas standards document. First, science.

(2) Nature of science. Science, as defined by the National Academy of Sciences, is the "use of evidence to construct testable explanations and predictions of natural phenomena, as well as the knowledge generated through this process." This vast body of changing and increasing knowledge is described by physical, mathematical, and conceptual models. Students should know that some questions are outside the realm of science because they deal with phenomena that are not scientifically testable.


Seems to me there might be some code in there. If “scientific explanations” means evolution, wouldn't “questions outside the realm of science” mean creation?

Next term, scientific theory.



(C) know that scientific theories are based on natural and physical phenomena and are capable of being tested by multiple independent researchers. Unlike hypotheses, scientific theories are well-established and highly-reliable explanations, but may be subject to change as new areas of science and new technologies are developed



Then I looked at the context of the “code” statement. How exactly did the Texas educators hope students would apply the critical thinking skills developed by examining all sides of scientific evidence? The section containing the “code” statement starts out

(3) Scientific processes. The student uses critical thinking, scientific reasoning, and problem solving to make informed decisions within and outside the classroom.


Since students are expected to spend 40% of their instructional within the science classroom actually doing science, they are going to have to learn to make some decisions. Those decision-making skills, it is hoped, will serve the students well outside the classroom.

Section 3 then starts with Dr. Osborne's code statement.

A. In all fields of science, analyze, evaluate, and critique scientific explanations (my bold) by using empirical evidence, logical reasoning, and experimental and observational testing, including examining all sides of scientific evidence of those scientific explanations, so as to encourage critical thinking by the student.


So first comes the acquisition of scientific skills and next comes the application.

(B) communicate and apply scientific information extracted from various sources such as current events, news reports, published journal articles, and marketing materials [written text] ;
(C) draw inferences based on data related to promotional materials for products and services


The standards repeat the same definitions and expectations within each of the major subject headings, even to the extent that, for example, Section 3A under Aquatic Science is the same Section 3A under Astronomy, Biology, Chemistry, Earth and Space Science, Environmental Systems, Integrated Physics and Chemistry, and Physics—word for word eight times.

Finally, Dr. Osborne defends the inclusion of Darwinian evolution in the curriculum.

Darwin’s place on the school science curriculum is justified because it meets two fundamental criteria.


I presume that he would agree the inclusion of any other topic in the science curriculum also meet both “fundamental criteria.”



First, it is a “big idea”—one that dominates and frames the discipline. For the life sciences, anyone who does not understand its major principles and tenets would be as illiterate as someone studying English who has never heard of Shakespeare.


No argument there. I would add, perhaps provocatively, that the study of English literature should likewise include the many literary allusions from the Bible.


Second, within the scientific community it is not up for discussion. And, as it lies beyond criticism, it is hard to see what value any attempt to evaluate critically the evidence and logical reasoning on which it rests would serve.


Well, scientifically speaking, pretty much everything is always up for discussion. Nothing within science is beyond criticism.

Creationists may argue that the biggest idea is God, and a God such as they postulate would certainly be above criticism. The pot does not complain to the potter. But that is precise why creationism is not science. “It does not matter how big the idea, if it is not falsifiable, it is not science,” so said a scientist (personal communication), not a science educator.

Whatever modifications scientists may make to Darwinian evolution in the future, Charles Darwin's place in the science curriculum forever is assured. If it should happen that Darwinian evolution should find its way to the scientific waste bin as a scientific theory, it will always be around as scientific history.


The Texas standards specifically address evolution thusly:

(7) Science concepts. The student knows evolutionary theory is a scientific explanation for the unity and diversity of life. The student is expected to:
(A) analyze and evaluate how evidence of common ancestry among groups is provided by the fossil record, biogeography, and homologies, including anatomical, molecular, and developmental;
(B) analyze and evaluate scientific explanations concerning any data of sudden appearance, stasis, and sequential nature of groups in the fossil record;
[(B) analyze and evaluate the sufficiency or insufficiency of common ancestry to explain the sudden appearance, stasis, and sequential nature of groups in the fossil record;]
(C) analyze and evaluate how natural selection produces change in populations, not individuals;
(D) analyze and evaluate how the elements of natural selection, including inherited variation, the potential of a population to produce more offspring than can survive, and a finite supply of environmental resources, result in differential reproductive success;
(E) analyze and evaluate the relationship of natural selection to adaptation and to the development of diversity in and among species; [and]
(F) analyze and evaluate the effects of other evolutionary mechanisms, including genetic drift, gene flow, mutation, and recombination ; and [.]
(G) analyze and evaluate scientific explanations concerning the complexity of the cell.

Friday, July 31, 2009

An Alternate Theory of Human Evolution?

Elaine Morgan hypothesizes that humans evolved from a water primate and laments the lack of interest and research within the scientific community.

She questions the prevailing Savannah theory because of the intriguing questions it does not answer:

1.Why are humans the only Savannah animal to walk upright?
2.Why are humans the only Savannah animal with a layer of “blubber” directly under the skin?
3.Why are humans the only “naked” Savannah animal?
4.Why are human babies born with so much fat, compared to other mammalian babies?
5.Could capacity for speech be related to the ability to control air flow similar to the control exhibited by diving birds and other water animals?

And many more questions.

She is not the only one skeptical of the Savannah theory. Many “real” scientists have developed doubts.

The Savannah theory suggests that our hominid ancestors evolved on the dry plains of Africa, and the theory still has many supporters.







In a separate BBC documentary, Mrs. Morgan graciously advises young scientists to avoid imperiling their careers over her hypothesis. If sound, she says, the theory will eventually prevail. If unsound, her theory deserves to be discarded.

Did humanity arise out of water? It has to be considered.