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What is this chemistry thing that we are trying
to introduce our students to in high schools, colleges,
and universities? Or, what should students anticipate as
they enter a beginning chemistry course? If we aren't clear
on thateven if we don't all agreeour attempts to
improve what we are doing will fail.
Currently there are two very different, usually
unrecognized, views of what introductory chemistry is. (One
or the other of these views is held by teachers who have a
great variety of qualifications, experience, teaching situations,
and teaching goals.) Only if we are aware of these views can
we move beyond the introductory chemistry courses that so
many students find troublesome and useless.
Most teachers and most students see chemistry as
an immense, powerful body of accumulated knowledge. In an
introductory chemistry course students learn to manage the
information and procedures that have become identified with
the course. Students profit by this training and by the
credentials that show they have made a first step into the
society of chemists.
Some teachers and some students see chemistry as
consisting of the avenues that each of us can take as we try
to make sense of a part of the physical world. Each
student builds a base of understanding and can then go on to
make sense of the idea of atoms, molecules, and all the
chemistry that is opened up. As each student makes a start into
chemistry he or she gains added respect for reason and for
the individualand appreciates that great legacy from the
Age of Enlightenment.
These two attitudes to introductory chemistry
courses illustrate a general transformation that some
academics, like Niel Postman (1), see as occurring in all of society,
culture, and education. Acceptance, and then management,
of collective knowledge is increasingly important.
Individual understanding and making one's own sense of aspects of
the world is less valued. We count more and more on being
part of groups that know about things and less and less on
ourselves to make sense of things.
Students bring their socialization with them when
they embark on an introductory chemistry course. By the
time they reach these courses, most students have no
confidence that they themselves can make sense of a subject like
chemistry. They can't even imagine stepping outside the
social mainstream. Whatever the intent of the instructor,
these students process what they hear or read so they can
manage this course material. They simply screen out any
inappropriate attempts made by some teachers and some texts
to help them build their own understanding.
The opposing attitudes of managing provided
material and building an understanding into which new material
can fit are muddled together in the minds of teachers and
students, and in textbooks and laboratory manuals.
Students who expect simply to manage
information and procedures are held hostage to old-fashioned
material that is of value only if its basis is understood. For
example, students learn to calculate the percent ionic or
covalent character from the formula of a compound and
electronegativity values. They recognize this as an appropriate
introductory-chemistry question. The object is to assign the
covalent or ionic label, or percentage, to the formula.
Nothing more. They don't want to deal with an actual substance
and the properties that it might be expected to have. But
why do we bother with this calculation, involved as it is
with pretty slippery quantities, if it is not part of the
bootstrap operation of making sense of compounds and the
elements of which they are composed? There are now much
better ways to help students enter into the vast world of
chemical information and procedures. Continued attachment to
material that has its origin in making sense of the chemical world
is denying students the chance to work together to develop
useful information management tools and cooperative work habits.
Students who expect the subject to make sense are
sacrificed by the need to satisfy the majority who just want to learn how
to manage all this stuff. Look at the first chapter of any of the
popular general chemistry texts. There you find the usual definitions
and examples of heterogeneous and homogeneous mixtures,
substances, elements, and compounds. Very dull, and of use only at exam time. For
students who want to go on to make sense of chemistry,
we should use this opportunity to make them comfortable
with a few mixtures and the names and properties of a
few substances. But since the standard presentation treats
the management tools, not that which is being managed,
we slight the actual mixtures and substances that are the
basis of chemistry. Students are hustled past the experiences
on which understanding is based and then, of necessity,
presented with sets of recipes that now constitute
mainstream chemistry.
In introductory chemistry courses we must
recognize the powerful social forces that form mainstream
attitudes. (If we try to ignore them and accept only traditional
values we will have about as much success as we would
convincing all our students that they should be reading a good
book instead of watching TV!) We can make introductory
chemistry courses of value for all our students if we accept the
legitimacy of the two different views of introductory chemistry.
We can purposefully teach the management and
social skills that serve the mainstream majority. In high
schools, the very successful ACS-supported Chemistry in the
Community program is already focusing on the community,
or social, aspects of chemistry. Teachers are turning to
the Internet for information management-type projects.
There is growing interest in modular units and cooperative learning to support the socialization of chemistry. Ways such
as these of introducing students to the collective knowledge
of chemistry can be even more effective if scientific
traditions are set aside and the distinctive character of new
approaches are recognized. What an opportunity for
educators, publishers, computer companies, and chemical industry
to come together to encourage and support the
development of programs and materials for these new approaches
to chemistry!
We can also, separately, provide avenues to
understanding and individual development for those so
inclined. What if we could sort out those of our beginning
students who want their education to include, or even consist of,
developing their own understanding? These students
read, they can follow the logic of a presentation, and they
want to see the sense of the subject. What a wonderful world
for them, and their teachers, if they were freed from the
millstone of the mainstream majority. Soon new aids to
learning would emerge: textbooks that are not just
workbooks, laboratory work that is not just gradable, lecture
demonstrations that are not just entertainment. Chemistry,
even at the introductory level, could regain its place in the
minds of these students as a great scientific adventure.
Many obstacles are in the way of acceptance of the
two routes into chemistry and the rationalizing of our
introductory chemistry courses that could result. Curricula are well
established and prerequisites simply say "chemistry";
teachers, some with their own good programs, tend to be
committed to their own efforts; funding agencies, project
directors, publishers, and now computer companies,
are comfortable, or at least occupied, with ongoing financial
affairs; even chemical educators are preoccupied with what we
already are doing. All are caught up in the chemical
education systemeven if, at the introductory chemistry level, it is
a mishmash that does little for most students. But we owe
it to all those students who come our way to make sense
of what we are doing and then to develop the two great
avenues that are now appropriate. Then students,
teachers, and all the other stakeholders will prosper.
Literature Cited
1. Postman, N. Technopoly: the Surrender of Culture to
Technology; Alfred A. Knopf: New York, 1992; Postman, N.
The End of Education; Alfred A. Knopf: New York, 1995.
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