HEURISTICS
How to survive basic chemistry.
Learning style management.
Class management.
How to study for tests.
Some pointers on general studying for
chemistry.
Problem solving skills in chemistry.
Some possibly useful pointers on problem
solving.
HOW TO SURVIVE BASIC CHEMISTRY
In many high schools and colleges the basic chemistry course
is the one that causes most concern among students. With
everything going right, chemistry can be a fun but challenging
course. Under poor conditions, your first chemistry course
can be a real spittin’, cussin’ nightmare. The study of
chemistry may be different from anything else you have ever done.
In fact, there are several different topics in chemistry THAT MAY
NEED TYPES OF STUDYING TAILORED TO THE TOPIC. Basic chemistry is
a survey course in chemistry (That is, it covers a little bit of
everything.) with emphasis on common chemicals and study
techniques. The aim is to give you some chemical and general
scientific literacy rather than train you to be a chemist. This
outline is to: (a) tell you what to expect in most courses, (b)
show you some methods of study for the course, and (c) show you
some directions you can turn to for help, if you should need it.
The most useful advice is to stay up with or ahead of the
class. As the Red Queen said to Alice, “Now, here,
you see, it takes all the running you can do, to keep in the same
place. If you want to get somewhere else, you must run at least
twice as fast as that!” If you fall significantly behind in
basic chemistry, it is hard to catch up, but catching up is the
only way to continue. The material "snowballs" in this course. By
that I mean that the basic facts that need to be learned or
memorized at the beginning are going to be used later in the
course. Fluency in the basic material is necessary for you to be
able to understand and learn the more complex ideas in the
course. Chemtutor can help you keep up by showing you study
methods, explanations, and other ways to learn the material.
We have found that students do better by having a quiz over a
small amount of material. Act as if you will have a quiz every
class period. These quizzes would either ask you to memorize some
basic material or to use some of the material in a math process
or a basic idea about chemistry. Designing and giving yourself
quizzes to help you schedule your studying will prepare you for
the major tests. Chemtutor usually has a Quickquiz or some math
problems available to you to help you. If you are studying with
someone, teach it to each other. The teacher always learns more
than the student. (If you have it together sufficiently well to
present it to someone else, you know it a lot better.)
Many students find studying with others from the same class is
a lot of help. If you get together in a group of three or four,
you will always have someone to study with. If you study with
other students, it is easier to call them for missed
assignments if you must be out.
Back to the beginning of Heuristics.
LEARNING STYLE MANAGEMENT
Learning is easy for some people. They can read something or
hear something and understand it. For others the number
of useful learning methods are more limited. Just because a
person has a limited way to easily learn DOES NOT MEAN
THE PERSON IS STUPID OR UNEDUCABLE. The term LD (learning
disability) indicates that a person has a difficult
time acquiring and learning information by one source or another.
It is truly unfortunate that a small number of students
have used the idea of a learning disorder to attempt to cover for
laziness. Most of the students who have a learning
disorder would dearly love to be like other students, but they
have experienced disappointment after disappointment.
If you have a learning disorder, you must analyze (or have
analyzed) exactly what it is and learn your best way to
compensate for it. Anyone teaching for any time has seen the
student who will obey a spoken request, but when asked to
read the request will appear to let it go in one eye and out the
other. For some people the written word just does not
register in the right way. For this type of learning disorder a
student might find that reading the assignment aloud from the
book will help. For others, copying the words in the book works
best. For students who have a rough time understanding
oral lectures, (Ask the teacher first.) bring a tape recorder to
school and tape the lecture. At home, speak the lecture after
the teacher or transcribe the lecture. Whatever works is best for
you.
If you have a problem with learning, YOU CAN USE THIS CLASS AS
AN EXPERIMENTAL PLACE to find some
ways you can adapt to learning this type of material.
Particularly the students who want to go into any type of
scientific
work will see this type of material again along with the need to
grasp great amounts of it quickly. So the basic chemistry
course makes a good practice ground for whether you can adapt
yourself to this type of study. You know yourself best,
so the person to help you with learning problems best is
yourself. You need to vary your learning techniques UNTIL
YOU FIND SOMETHING THAT WORKS for you for each type of studying.
Try a number of methods. Use varying
techniques. If teaching chemistry to your little sister works for
you, do it. If you do not seem to find a way that you can
use, consult a counselor who is willing to help you get
professional assistance.
Back to the beginning of Heuristics.
HOW TO STUDY FOR TESTS
The type of test you can expect will, to a certain extent,
determine what kind of studying you must do for it. Most
instructors will tell you what style of test they will give you.
Objective tests (fill-in-the-blank or multiple choice) likely
have the most obvious study methods. Flash card and
association techniques are old standards for this type of work.
Students working in pairs can quiz each other on this type
of material. Make lists when you need to. Be sure you understand
definitions rather than just memorizing them.
Math tests require the information of the objective tests and
the practice in working problems. Historically in this class, the
majority of trouble with math comes not from the math itself, but
with background information that is lacking. Much of the
background comes from the material Chemtutor suggests you know.
If you have a problem with the math, first go back
and learn the background well enough to use it. If the math
itself is a problem, you need to ASK FOR HELP from a
student or instructor. There is some help in math for you in
Chemtutor, but if you have live help who can emphasize the
points your instructor is requiring, that can be as useful. Many
times your instructor will suggest a problem solving
technique to you. Learn it and use it. If your instructor does
not suggest a problem solving technique, Chemtutor has
several approaches you can use.
Essay questions require yet another set of skills. The
questions contain words like “explain” or
“describe” or “compare”, and you will be
expected to write an essay on the subject at the test. The first
requirement, of course, is that you be able to write in the
English language. Without intending to be unfriendly or mean, I
do know that there may be some who have difficulty with that. The
best I can tell you for a problem with the English language is
that practice definitely shows.
Some students are used to writing a large amount of FILLER on
essay tests. Most instructors can easily see through that and do
not grade it, except downward if it becomes excessive. Most
instructors look for content when they grade an essay test.
Essay answers may be expected to contain information from the
book and/or from lecture. To study for essay tests, you should:
(a) consider some of the likely questions you might have, (b)
collect information, (c) organize the information into an answer,
(d) compare your answer to some of the answers of your
classmates, and (e) practice answering the questions at home as
if you were at the test. You should memorize important items you
need to mention (“key words”), but usually efforts to
memorize whole answers word-for-word do not work well.
Chemtutor can help you keep up with the class. If you still
need help, other students in your class may be able to help you.
If you do not get the help you need from students, call or visit
your instructor. If the other students can not help you,
maybe they also need some help. Most instructors would be glad to
help you on an individual or group basis. ASK. Get help
far before you find yourself close to failing. Many
instructors understandably feel uncomfortable about helping
students with their work only a few hours or minutes before a
test. Usually they have test materials to get together at that
time and feel a panicky student is not likely to learn much at
short notice.
Back to the beginning of Heuristics.
CLASS MANAGEMENT
Chemtutor can be of significant help to you in the general
material of the course, but each course and instructor is
somewhat different. Your instructor should give you a course
syllabus, a description of the course with information on
what you need to do to pass the course. Keep your course syllabus
as the first page of your class notebook. This may sound somewhat
compulsive, but a well-kept notebook can be a great help to you.
Keep all your notes in a three-ring or other insertable binder.
Everything pertaining to the course should go into the notebook,
preferably in date order.
Taking class notes is another important art. You must be able
to judge what is important enough to write in your notes. If you
are too busy writing notes, you may miss something useful. If you
have trouble taking notes, you should compare your notes with the
notes of other students in the same class as soon after the class
as you can.
If you need help or information (notes or assignments) in the
course, your first questions should go to the members of your lab
or study group. Next, ask other students in the class. Get the
name and phone number or email address of the members of your lab
group and other students in the class. Keep these in your
notebook. CALL them when you need guidance about course
requirements.
Some colleges and universities allow you to drop a course
before the end of it to preserve your grade average. If for
some reason you need to drop out of the course, give your
instructor the courtesy of the opportunity to talk with you.
There are some good reasons for wanting to drop out; you don't
feel you have the background, you don't have the time to devote
to the work, you have other turmoil in your life and can't
expend the emotional or mental effort, your work schedule
conflicts with your school, etc.
Back to the beginning of Heuristics.
SOME POINTERS ON GENERAL STUDYING FOR CHEMISTRY:
- Keep up with the course. Catch up as quickly as you can if
you fall behind.
- Know all rote material perfectly.
- Understand all concepts before going on.
- Thoroughly memorize all background material you are
assigned.You will need it later.
- Keep a close watch on the assignments for the course. Call
other students if you must.
- Find a good place to study. It must be comfortable, quiet,
well-lit, and have all the things you need.
- Find a good consistent time for studying chemistry.
- Review lectures as soon afterward as you can.
- Determine which study methods are best for you.
- Study with others if it helps you. Choose study partners
who are serious about learning.
Back to the beginning of Heuristics.
PROBLEM SOLVING SKILLS IN CHEMISTRY
In general, ACCURACY needs to increase rather than speed. Any
technical literature is concentrated, and any form of
“speed reading” is a waste of time on informationally
dense material. Instead, devices to increase comprehension are
necessary, such as mental models, finger counting, lip movement,
figure drawing, or reading aloud to another person.
Intelligence may be defined as the ability to do abstract
reasoning. Weaker students jumble abstract reasoning from lack
of ability to grasp the entire problem at “one shot”.
The next step for a weaker student is to give up for lack of a
way to
even get started. The best students support abstraction with
concrete ideas. It is not the ability of the better student to
fully
grasp the complete abstraction that sets them apart, BUT THE
ABILITY TO ORGANIZE A PROBLEM SO THAT
NO PART OF IT IS TOO DIFFICULT. The idea behind the abstraction
becomes more apparent as the idea is used.
Another way to put that is that the better student does not
usually have more efficient mental “hardware” but
better
“software”.
One tool for the development of better methods of problem
solving is to take a short standard intelligence test and later
analyze the results. The number of correct answers is not the
most important data, but the analysis of how to
“concrete”
each question and how to spot potential errors on a case-by-case
basis can help students see some ways to improve their
personal analytical reasoning ability.
The use of a standardized test will give an ability to see a
broad general group of problems that are each
“informationally
neutral”, that is, having no need for a body of background
information other than the very rudimentary, such as the number
system, the alphabet, and the ability to define words. Indeed, on
any IQ test some questions require just word definition
knowledge. In coursework, though, a body of knowledge is needed
to interpret the questions. In chemistry some of this
material may have to be known by rote in order to most
efficiently perform on tests. Some examples of material that
should be know by rote are the symbols of elements, polyatomic
ions, some valences, measurements and the conversion
factors among them, dimensions and the symbols for them, and some
common names for materials. There are several
ways to learn rote material, to include flashcards, pair
quizzing, mnemonic devices, and reading aloud.
Class time is
poorly
spent on rote material, but it is the teacher's responsibility to
point out which material is a candidate for rote learning.
There is, unfortunately, no way to “pour” this
information into a student. That basic maturity of recognizing
something that
must be done and DOING it is necessary as a prerequisite.
We say that the math is difficult for the students, but they
can do the arithmetic very well on the calculators they have. The
real stumbling blocks are difficulties organizing the problem and
a lack of background rote information. The
problem-solving technique needs to be practiced first with
trivial problems and then with increasingly difficult problems.
“Practice makes perfect” seems to be true; the best way
to learn what can go wrong in a problem is to make the mistake
yourself, find the mistake, and learn from your mistake. Again,
from the initial observations, any problem that can not be
thought out completely in the head needs an overall
‘roadmap’ toward a solution and an orderly
implementation of the
pathway in which each step is demonstrable. For some good ideas
on solving problems that are not the “formal” type of
chemistry homework problem, see Polya's book, “How to Solve
It.” For chemistry problems involving a formula, one
pathway is the W5P method to be introduced later. For most
conversion problems (many of the chemistry problems), the
Dimensional Analysis system, also to be introduced later, is a
splendid framework. The point is that with a good
framework in which to think of the problem, a complicated problem
is merely a series of simple problems.
Back to the beginning of Heuristics.
SOME POSSIBLY USEFUL POINTERS ON PROBLEM SOLVING:
- Read the problem carefully, moving your lips if necessary.
- Find the best way to think of the problem in the most
concrete terms.
- Draw the problem, if possible.
- List the important information items in the problem.
(GIVEN
AND FIND)
- Know the background material for the problems.
- Follow the problem-solving method your teacher gives you,
if one is given.
- Understand and use the units of quantities.
- Know your own weakest points so you can be wary of
them.
- Go back and check your work. Use the units of the
measurements to check your work. If the answer does not
make sense, something is wrong.
Back to the beginning of Heuristics.
Numbers and Math
Units and Measures
Atomic Structure
Elements
Periodic Table
States of Matter
Compounds
Reactions
Mols, Stoichiometry, and Percents
Oxidation and Reduction Reactions
Gases
Solutions
Acids and bases
Kinetics
Thermochemistry
A mnemonic device is a memory trick for memorizing
information, such as HOMES as a memory jogger for the Great
Lakes; Huron, Ontario, Michigan, Erie, and Superior. Medical
students use menmonic devices to remember the cranial nerves such
as, "On Old Olympus' Towering Tops A Finn And German Viewed Some
Hopps," and some other less likely and more scatological sayings.
There was a cartoon in the New Yorker magazine some years back
in which a neurosurgeon had a patient on the operating table with
the top of the head off. The surgeon was stepping back pensively
reciting the, "On Old Olympus'....." mnemonic device, with the
obvious caution that there is a limit to the utility of such
mnemonic devices. There comes a time when the information must be
a little more fluent.
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