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Appetizers and Lessons for Mathematics and Reason
by A. Selby, Ph. D.   Feedback & Questions

20 pages in French: Algèbre  
 Définition d'une variable
  
La raison basée sur les  règles et modelés

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Welcome.   The ends, means and values of mathematics education represent a jigsaw puzzle with some pieces missing, or as yet undefined. This this site area is a depository for some of the pieces, and ideas on how to find the missing ones.  

The June 2010 composition of POMME implies half  of the essay below are moot. .  POMME, its outline and its ends and values,  says how to put the jigsaw pieces together, those previously online and those yet to be written.  Site growth and pruning will be begin with the composition of lesson and the description of lesson plans or options for the mid-level applications of POMME. Then the rest of site material, including some ideas below, will be recombined or rethreaded to provide paths and in them a lower bound for upper level secondary or early university instruction. 

Most paths will develop key material (starter and further lessons) but some paths given to reinforce and refine skills will be marked as optional, as possibilities to consider or avoid. The question of which way to go is answer here by a statement and balance of ends, values and methods.  Here we avoid ends and values for methods for supporting them do not exist.

About this Site

Paths for Mathematics & Science Education, an 2008-11-16 essay

Via the school of hard knocks, I have seen that student may prefer rote learning and dislike explanations which start with the supposition that explanations why are key to mathematics mastery.  Despite my aversion to rote learning, I see aspect of rote learning in (a) Calculus instruction where students are told to learn to do first and to worry about the theory second, and where technical proofs in are inaccessible, or largely slowly, where the logical structure is based on theorems stated with out proof, axioms or assumed patterns given without motivations; and (b) before calculus in the mastery of arithmetic,  methods for addition and subtraction may be explained in all or part while  methods for multiplication and long division are given without, and so learnt by rote. 

When the mathematics teachers offers proofs in a classroom or motivations or chains of reasons to support the use of method or to reach the statement of a theorem, students may object on the grounds that school authorities would not ask instructors to present false formulas or false statements in class. Hence proofs and explanation why are not needed. There-in lies a student argument for rote learning and against the appearance of proofs in mathematics. 

Mathematics education in general may provide  methods and statements to met and master via (I) rote -that is by presentation of methods and patterns to use; OR via (II) inductive learning based  examples that draw on and provide experience, hands-on or on paper, to provide comprehension  in all or part (hand waving); OR via (III) deductive learning that draw methods and conclusions from chains of reason which formally or informally depend on earlier knowledge, that earlier practices or axioms (explicitly assumed patterns).

While we may consider deductive education to be the highest form of learning, that education  is based on axioms or assumed patterns, usually algebraically described, and which require mastery of the algebraic shorthand way of writing and reasoning alongside the ability and patience to follow chains of reason or implications. But this edifice stands on axioms which are given, or drawn from experience - that of the students or that of course designers and their ancestors in course design and delivery. In essence there is a bootstrap operation. Deductive codification begins with stated axioms, typically but not necessarily  given for rote learning. That being said, site lessons via examples provide or indicate an inductive development of high school mathematics in which axioms (assumed patterns) - those needed for a more secure deductive development of the discipline - are drawn or suggested by example based experience. 

Mathematic education besides off-paper measurements and perceptions begins with on paper mastery of counting, arithmetic and drawing methods, methods that lead to observable, repeatable, reproducible and if need-be, correctable, results and thus feedback to students. The ability to apply a method in a careful step-by-step manner to obtain repeatable, reproducible results is the first source of skill and confidence in mathematics.  The combination of methods, implications rules A IF B included, in sequence one at a time and one after another,  forms chains of reason or action that can be followed to again provide repeatable, reproducible, observable and correctable results on paper or off. Developing the ability to combine rules and patterns to obtain further ones, theorems included, is part of mathematics and key to its deductive codification and foundation, modulo the limits of axiomatic systems. 

Within an axiomatic deductive framework,  each of it statements is subject to testing or the following question. Can we find a direct or indirect chains of reason from the axioms - the explicit assumptions of the framework or  code - that imply the statement or its negation.  Those chains of reason provide a proof.  In English common law, the accused is assumed to be innocence and the accusation or suspicion false until there is clear enough proof of guilt - a convenience for the defendant or accused. In the French civil law, the accusation or formally statement suspicion is assume to be guilty until proof of innocence is available - a convenience for the prosecutor. In contrast, in mathematics a  conjecture or formally stated suspicion is not presumed to be false or true. 

In mathematics education, a rule or theorem that a student is asked to meet and master is likely to be true, modulo the axioms and practices of deductive logic in the discipline.  The student objection that following the chains of reason and verifying each step there-in is not needed represents a plug-and-play approach to mathematics and division of labour between the developers of mathematics and those who might apply, including the students who object to meeting and following proofs, or providing them. An operational and empirical  command of mathematics for the home and for the workplace is possible in a repeatable, reproducible and observable manner by rote learning, and without proofs. That operational and empirical command of the necessary mathematical methods should be an aim of mathematics education. In it,  the key to deductive reason, the ability to combine rules and patterns to imply further one might be present in that operational command.  Then a theoretical command of mathematics in addition requires mastery of the proofs, or the ability to produce proofs within a given set of axiomatic and logical practices. Full comprehension of the axiomatic method may be based, as indicated above, on drawing the axioms themselves from experience of students - that provided by a careful selection and discussion of examples, along side a deliberate and earlier development of algebraic, shorthand, ways of writing and reasoning.  Those could be prerequisites to the axiomatic development.  For classrooms full of students  (a) wanting to learn how to to do and nothing more, and (b) wanting to understand as well, course design and materials may cater to (a) in class, and provide full or fuller support for (b) in further material for reading or viewing. There-in lies the site objective.  

Mathematics is art or discipline whose methods do have to be plug and play. Thought-based development is possible. In contrast, the methods of science and technology can be described in the classroom,   and supported in part by basic instruments - mechanical preferred - and simple experiment that do not involve plug-and-play components. The question for science education is how to minimize the role of plug-and-play components in the science lab to maximize the hands-on experience and evidence for scientific process in the high school and/or college lab. Unlike mathematics,  where plug and play can be avoided,  science education and labs must rely on plug and play elements - elements that are beyond the reach of the classroom lab.  That irks. 

  1. Site History and Content - through site reviews 1995 onward.
  2. Site Eurekas - Site Highlights, an old view
  3. How this Site Differs
  4. Reactions to Site Material - comments & questions, good and bad.
  5. Site Origins
  6. About Site Lesson Plans - Another tour of Site Content

Challenges for Education Reform

  1. Five Decades make a difference
  2. Managing Reform - Assigning Responsibilities. (Should anyone be responsible? Should anyone be in charge? Is reform headless?)
  3. Mathematics in Context - What Context?
  4. What Should be Learnt and When?
  5. Grouping Students - Streaming?
  6. Learning Takes Time and Effort
  7. Making the Hard Easier but Ignoring how and so missing the Point
  8. Hook, Line and Sinker - Mathematics Education Inconsistencies  - Reform in North America
  9. More on Mathematics Education: Covers: For a leaner curriculum, Education an empirical art,  More on testing, Constructivism versus Empirical Methods.
  10. Four Skeptical Essays on Constructivism Revisited - Incompleteness
  11. Euclidean Model for Development. Damage Reversal
  12. Educational Follies - Learning By Discovery incomplete, cannot work, compound difficulties.
  13. An Educational Inconsistency.
  14. Modern Education

But teaching by indirect instruction requires not only a knowledge of what can be taught directly, but also a knowledge of how to explain all elements indirectly. Anything less invites or compound difficulties. Ouch.

Ideas and Principles For Instruction and Educational Reform

  1. Inductive Principles For Instruction - systematic skill and concept development.
  2. Fairness in Education - requires systematic development of all skills and concepts.

    Can education be fair if students are tested on natural talents instead of developed ones?  Mastery of a skill,  say the algebraic way of writing and reasoning, is regarded as a natural talent when and only when  we do not know how to systematically develop that skill or concept. Site material reduces the number of natural talents required in the mastery of mathematics.  Find the  four skills for algebra in chapters 8 to 14 of Volume 2, Three Skills for Algebra, to see how to artificially and artfully develop the algebraic way of writing and reasoning, and thus make mathematics fairer.
  3. Apprenticeship in art, trades and disciplines, a classical view.
  4. Education is an Empirical Art
  5. Key Notes and Themes
  6. Three Remarks
  7. For a Leaner Mathematics Curriculum
  8. Need for a Mixed Mathematics Curricula
  9. Extent and Need for Quantitative Skills depends on your society
  10. Ways to be a Better Instructor - Ideas and Methods - try with caution
  11. Four Ways to Improve Education Reform, and avoid disaster.

Lesson Plans, Aims and Goals (Ends, Values and Means?)

  1. Three Aims for Students - Ends and Values
  2. Three Goals for Mathematics Education, etc - Ends, Values, Unifying Themes
  3. Lessening or Avoiding Algebra Difficulties
  4. Algebra Lesson Plans
  5. Algebra, Geometrically
  6. Mathematics Curriculum Shifts
  7. Advice and Suggestions for Course Design and Delivery
  8. Teaching Tips - from fractions to Calculus
  9. Math Education Perils (Arithmetic, Algebra, Calculus)
  10. Talk the algebra talk
  11. First Year High School Math - Lesson Plans with Fraction Focus
  12. Second Year High School Math - Lesson Plans with an algebra focus
  13. Third Year High School Math - Lesson Plans with a Focus on Slopes
  14. Math Wall Posters
  15. How Letters Appear in Mathematics
  16. Map, Plans and Drawings, a multi-year project

Links

  1. Links - Just a few.
  2. Activities to Engage Students - links to explore

Logic and Reason in Mathematics

Mixing Rote & Thought-Based Development

  1. Cultivating Intelligence - Why value careful mastery of rules and patterns, steps and methods, practices, in a repeatable and reproducible manner.
  2. Multiply Kinds of  Reason in mathematics - Essay I
  3. Multiply Kinds of Reason in Mathematic- Essay IIs - On the hierarchical development of rules and patterns, steps and methods, and practices in pure and applied mathematics (mixed mathematics). What is proof? What options are there for a thought-based development and verification of college and pre-college mathematics?
  4. Theory of Knowledge - Stories, Longer and longer
  5. Formal or Informal Peer Review
  6. Education in Mathematics, Science and Technology - All based on empirical verification and empirical skill development and verification. But in mathematics we can offer a full thought-based development while in science and technology, we can introduce the scientific method and introduce lab equipment, but can only provide a full-thought based development through visits to the lab and library. The lab alone is insufficient. 
  7. Maths Instruction in General - Three Goals A B and C to Set for Student, Supporting those goals and why rewrite the curriculum
  8. Operational Viewpoint - Aim for an Operational Command of Mathematics First.- For students with no immediate interest in the know-why, a focus on the practice, an operational command of key skills and concepts may make comprehension later of the know-why easier and more appealing. The calculus teacher may says to students - learn to do now and to understand later.
  9. How to Set Standards for textbooks and course materials -  Need for Inspection by University Domain experts outside of Education Faculties to ensure bureaucratic course design and textbook composition does not lead to nonsense in mathematics education.

Teacher Training

  1. Teacher Certification Issues and Cautions
  2. Math Ed. Professors - Training, Education of

Archives:

  1. About this site - old version
  2. Old Site Entrance - 2010-05-1  
  3. Yet Another Old Site Entrance
  4. Maths Ed Stopping Rule - 2010-04-25
  5. A New Mathematics Curriculum - 2010-04-29
 

Mathematics 
Education  Essays

Group I

Site Reviews
Permissions
Applied Maths Program K1-12
Old Site Entrance 2010-05-13
Old Site Entrance
Words For Teachers
A New Maths Curriculum
Maths Ed Stopping Rule
Words For Teachers
Mathematics  Ed. References
Ideas for Better Instruction
4 Ways to Improve Reform
Theory of Knowledge
Peer Review
The Trouble With Algebra
Course Design and Delivery
How Letters Appear
Sit Down & Study
Modern Education
Key Notes and Themes
Site Lesson Plans
How This Site Differs
Site Origins
Math & Logic Puzzles
Comments on site content.
Why Bother
Three Goals to Set for students
Implied
About
Lean Effective

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Group II

Which Way to Go
Words For Instructors
Inductive Principles
Fairness Principles
Apprentices & Masters
In for a Penny
Constructivism and Cognitive Theory
Three Remarks
For a Leaner Curriculum
Mixed Maths Curricula
Cultivating Intelligence
Reason - 3 kinds in maths
Logic in Mathematics
Science Education
Maths Instruction in General
Operational View & Values
Standards
Ends and Values
Goals & Unifying Themes
Algebra Lesson Plans
Algebra, Geometrically
Mathematics Curriculum Shifts
Teaching Tips - Fractions to Calculus
Math Ed Perils
Talk the algebra talk
Sec I  - Fraction Focus
Sec II -  algebra focus
Sec III - Focus on Slopes
Maps-Plans-Drawings
Education, Empirical Art
Five Decades make a difference
Damage Reversal
Math Wall Posters
North American Math Curriculum
Managing Reform
Essay January 2007
Educational Follies
Contructivism Incomplete
Missing the Point I
Mathematics in Context
What and When, A Challenge
Grouping Students
Teacher Certification
Education of Math Ed. Professors
Site Eurekas
Links

For Senior High School  & Calculus Students

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Words  to clearly introduce algebra and variables have been missing in course design. For people who cannot do algebra, 
the missing words may explain or ease their difficulties.  Volume 2 ,Three Skills for Algebra,  in Chapters 8 to 14 & 18 etc, puts words before symbols to providing the missing words in a way that enrich the comprehension of all.  Those words form the middle part of a algebra (and logic) lessons aimed at helping or improving all of  high school mathematics and also calculus course design & delivery. 

For Avid Readers in School & Out - Online Books 
   1.  Elements of Reason. 1996 
1A. Pattern Based Reason  1995 
1B. Math Curriculum Notes 1996 
2. Three Skills for Algebra  1995 
3.
Why Slopes & More.Math 1995
Tour their 
forewords.   

Calculus Prep or Help: See Volumes 2 & 3, and this bigger Calculus Guide.  If your  calculus   questions is not answered here, submit it. Over time, that may complete the site development of calculus. 

For Parents: Speaking Skills, Reading & Writing Preparing for Scienceends, values and methods for work and study,  parent- friendly maths skill development booklets for ages 4-14.

Mostly For High School

Intro to Solving Linear Equations
 
- a different paths for junior and even senior high school students. Question for Tutors: When do you use and when you skip the stick diagram method here?

Fraction Skills,  thought-based  development, Ages 10 to 14 may need a tutor.  Students who have to understand in order to do may like the development in all or part. 

For Senior High School Mathematics & Calculus

5
wordy Logic Chapters
4 curious Algebra Chapters
Words before & besides symbols. A Key Algebra forward & backwards Chapter   
 

First Calculus Preview (1st intro)
Four Calculus Chapters  (2nd intro)
Intro to Complex Numbers (long)
Intro to Mathematical Induction (romantic & wordy at first)

Tutors & Instructors: These lessons introduce skills differently Would you recommend them? 

More Topics 

1. Decimal Arithmetic  Reference!
2. Integers - Intro to Signed No.s

3.  Fractions - fully explained.
4.  Fractions  with Units  
5.   Number Theory
6.    Solving Linear Equations  
Formulas for- & backwards -  
8.  Proportionality, Back- & For-wards.   
9. Logic Chapters:   
10.  Euclidean-Geometry  
11.  Slopes & Equations of Straight Lines.  (Take I. See take II below)
12.  Why Study Slopes
13. Maps, Plans,  Similarity & Trig,  
  (Take II included here)
14.  Quadratics: Starter lessons
15.  Polynomials: Starter lessons 
16 Why Factor Polynomials:  
17   Functions - Forwards & Backwards.  
18.  Exponents, Radicals & logs.  
19
Complex Numbers before trig (new advance/ starter lesson)
20.  DC Electric Circuits Etc 
21.
Real  Analysis 
22. The Olde Complex No, Trig
& Vector Section.
23. More Calculus Stuff
- written after Volumes 2 and 3.

Level I Material: New Stuff
Time and Date Matters
Level I Arithmetic. 
Money Matters
Measurement Matters
Matters of Chance (Risk Control)
Logic Chapters (leave what's not clear in Level I to Level II)
Using/Making Maps and Plans.
(A variant of
Maps, Plans,  Similarity & Trig,  to appear here).

For Instructors
-
Education Essays   (opinions, possibilities, references) 
- Free Advice and Directions for teaching primary & high school maths will be given in online meeting place with voice & whiteboard.   
- Math & Logic  How-TOs 
1. Arithmetic
2. Algebra
3. More Algebra
4.  Beginner Geometry
5.  More Geometry
6. Calculus 
7. Show Work or Logic 
These may be too dense for students.

Offering ideas to change education makes this site different.  Nothing ventured, nothing gained.  Site material is mathematically  correct, and where not, please report errors. The two level program POMME in the site entrance implies multiple paths for instruction. Supporting those paths in turn implies a clear destination  for site development and perhaps a new name.


 


www.whyslopes.com >>  Mathematics Education Essays (& Rants)    >>  Section Entrance     Next ]


Road Safety Message   Walk on a side walk. If that is not possible, try  not to  walk on a road with your back to the traffic.
Try to see what  trucks, cars, buses or bicycles are coming, so that you may step out of their way.  Put safety first. .

Support for Technical Mathematics from Number Theory to Calculus Prep

A. More Arithmetic a must for algebra etc D. Logic In Mathematics G. Algebra with Take Home Value I. Vectors & Functions
Decimal Lesson - Reference  
Counting & Addition
   (8 lessons)
Comparison to Subtraction
  (9 lessons)
Multiplication
( 11 lessons)
Long Division  (12 lessons)
Decimals and Primes (8 lessons)
-Primes & Composites 
-Primes Factorization
-Greatest Common Divisors & Multiples.
 
-Prime Factorization Aids 
(Learn how to find factors quickly)
-Prime Factorization Examples
 
-Counting & Generating. Factors

-Divisibility Rules and Remainders for Division by 2, 3, 5, 9 and 11.
Integers (12 lessons) Intro to Signed Numbers
Fractions (< 20 lessons)  Essential Skills & Concepts 
Ratios & Fractions (3 lessons):  Similarities & Differences
  
Units in calculations
Fractions  with Units
B.  Basic Algebra
Solving Linear Equations  
- in one unknown. Intro  with stick diagrams?
the normal way
 & with good nttn.
(the nttn that reappears in Gaussian Elimination. |
-in more unknowns: simultaneous equations essentially one unknown. the let algebra do the work view of  word problems.
  - still in more unknowns:  Gaussian Elimination via substitution, by equality or comparison, by operations on equations
C. More Algebra
Words before symbols: See if U like the lengthy chapters 8 to 12 in Volume 2, Three Skills for Algebra  
What is a Variable.  The answer here  is a simple prequel to the modern mathematics viewpoint.
First, every rule & pattern U meet in math, logic & science will be used forwards and backwards.  Get a head start with this theme by reading  Chapter 14 in Three Skills for AlgebraSecond, in the study of Proportionality Relations (3 dense lessons here) finding the proportionality constant gives an initial  backward  use of the proportionality formula.
 Talking about words before symbols and the forward and backward use of formulas gives words to make algebra simpler & clearer.  
If you can not read or write precisely, you will have difficulty in following instructions.  One wordy remedy  is given by chapters 2 to 5  in Three Skills for AlgebraWhere does Logic or a geometric model for reason Appear in Mathematics? The answer lies in  Euclidean-Geometry    In North America, Euclidean Geometry disappeared from high school mathematics as it was too hard. The light treatment here is a possible remedy.
E.  More Geometry
The Pythagorean Theorem. Chapter 17 from  in Three Skills for Algebra uses algebra and geometry   to show why the  Pythagorean equation  for right triangles holds. Its forward and backward use  is common exercise..  At a more theoretical level, the Pythagorean theorem leads the discovery that not all lengths can be  fractional multiples of a unit length. That geometrically implies a  need for and even existence of irrational numbers.
Analytic Geometry:
Common Practices with  Maps and Plans drawn to scale  give coordinate-dependent base  for senior high school development of similarity, trig, vectors and straight lines.   
Complex Numbers: This lesson on
Complex Numbers  draws on Euclidean and Analytic geometry. Sbortcuts simplifiy  trig identities, the cosine law; and   trig formulas for 2D dot- and cross-products. 

F. Logarithms, Exponentials,
Roots & Powers

Logarithms, exponentials, rational and real powers for secondary students. This  complete Operational Viewpoint. (Sufficient for the precalculus forward and backward use of compound growth and decay formulas in biology, physics, chemistry,  personal finance, and calculus. To learn more, if you study calculus,  see chapter 19 of Volume 3, Why Slopes and More.Math

In Volume 2, Three Skills for Algebra, chapters
  1. Geometric Sums Etc,
  2. Notation For Sums,
  3. Personal Money Maths and
  4. Some Finite Mathematics
identify methods useful in money computations, methods needed for calculus. Your teachers or other writer may present the same ideas with greater clarity and detail - A site to do.

H. Polynomial & Quadratics

Analytic Geometry:   -  Slopes and Lines - Take 1.   Take 2 appears in site section Maps and Plans.   Two views are better than one.  I may combine them later.  -In my school days, slopes appeared year after year.   This Why  Slopes calculus preview on graphs of functions y = f(x) explains why.  Enjoy.
Quadratics and Polynomials: Operations on Polynomials:
Meet a light and ultraquick geometric introduction to  multiplication, addition and subtraction of polynomials. Then see how the foregoing combine to permit long division of polynomials.    Compare Fractions  with Units. Enrichment: A Plus:  The Geometric introduction here gives or is almost identical to a justification for column methods in decimal arithmetic. 
Geometric Derivation of the Quadratic Formula  The account here gives a starter lesson for the more algebraically harder geometric-free derivation. If you study physics, chemistry or trigonometry, you will need to know about quadratics, their factorization and the quadratic formula.
Technical Value: The study of polynomials  high school mathematics has technical value as part of the senior high school mathematics preparation for calculus.  This simple account of Why Factor Polynomials   (Chapters 2 to 6 in Volume 3 .Why.Slopes.&.More.Math.) will give a context for the study of polynomials,  their factorization, and sign analysis of functions, all in a way that should improve your algebraic thinking and reasoning skills. 
Vectors in the Plane (2 simple lessons)
- Navigation with vectors or arrows
- Sum of Motions
- more lessons to be added later.
Operations on movement or vectors along the line and in the plane have value in mathematics in defining and implying the properties of real and complex numbers before the assumption of those properties as axioms.  Vectors and their properties appear in physics, its mathematical description and formulation. 
Functions - Forwards & Backwards.  Here is a full technical reference (24 lessons) for use in a calculus or precalculus course as needed. In it, the set viewpoint of functions expression of modern pure mathematics.  comes from the set-based codification and
In the mathematics education reforms of the 1960s in North America, primary and secondary school mathematics were expressed in terms of sets. That expression has now retreated from primary and secondary school texts. But it still lingers on, and can be very useful, a source of clarity and precision, in the situations where it should be retained: Counting with the aid of sets and functions; the description of functions; the high school account of probability theory; and in the discussion or illustration of ideas in logic. 

J. Pre-Calculus Skill Check

Arithmetic Skill Check.  In the calculus courses I taught 1983-89, too many students had weak skills in arithmetic. I would give and carefully correct these exercises to tell students what they needed to review and master.  
-  All the skills and concepts in 
Chapters 1 to 24 or Volume 2, Three Skills for Algebra: Look for those you do not understand and fill the gaps. Do so quickly while balancing this advice with  your other duties.  Good luck.

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