Exercise (mathematics)

<h2 id="overview">Overview</h2>

In primary school students start with single <a href="/facts/Numerical_digit/JJdLBoGT">digit</a> arithmetic exercises. Later most exercises involve at least two digits. A common exercise in <a href="/facts/Elementary_algebra/973nufT7">elementary algebra</a> calls for <a href="/facts/Factorization/tXrBXFh1">factorization</a> of <a href="/facts/Polynomial/Lzak8VVx">polynomials</a>. Another exercise is <a href="/facts/Completing_the_square/SN6xA8sc">completing the square</a> in a <a href="/facts/Quadratic_function/mKxHIC3U">quadratic polynomial</a>. An artificially produced <a href="/facts/Word_problem_(mathematics_education)/FpETahFy">word problem</a> is a genre of exercise intended to keep mathematics relevant. <a href="/facts/Stephen_Leacock/IBXHPlmj">Stephen Leacock</a> described this type:<a class="footnote-ref" id="fnref:1" href="#fn:1">1</a>

The student of arithmetic who has mastered the first four rules of his art and successfully striven with sums and <a href="/facts/Fraction/ghnQE9B3">fractions</a> finds himself confronted by an unbroken expanse of questions known as problems. These are short stories of adventure and industry with the end omitted and, though betraying a strong family resemblance, are not without a certain element of romance.
A distinction between an exercise and a <a href="/facts/Mathematical_problem/lFMR51de">mathematical problem</a> was made by <a href="/facts/Alan_H._Schoenfeld/U3glDolp">Alan H. Schoenfeld</a>:<a class="footnote-ref" id="fnref:2" href="#fn:2">2</a>

Students must master the relevant subject matter, and exercises are appropriate for that. But if rote exercises are the only kinds of problems that students see in their classes, we are doing the students a grave disservice.
He advocated setting challenges:

By "real problems" ... I mean mathematical tasks that pose an honest challenge to the student and that the student needs to work at in order to obtain a solution.
A similar sentiment was expressed by Marvin Bittinger when he prepared the second edition<a class="footnote-ref" id="fnref:3" href="#fn:3">3</a> of his textbook:

In response to comments from users, the authors have added exercises that require something of the student other than an understanding of the immediate objectives of the lesson at hand, yet are not necessarily highly challenging.
The <a href="/facts/Zone_of_proximal_development/pIfSH1hG">zone of proximal development</a> for each student, or cohort of students, sets exercises at a level of difficulty that challenges but does not frustrate them.
Some comments in the preface of a calculus textbook<a class="footnote-ref" id="fnref:4" href="#fn:4">4</a> show the central place of exercises in the book:

The exercises comprise about one-quarter of the text – the most important part of the text in our opinion. ... Supplementary exercises at the end of each chapter expand the other exercise sets and provide cumulative exercises that require skills from earlier chapters.
This text includes "Functions and Graphs in Applications" (Ch 0.6) which is fourteen pages of preparation for word problems.
Authors of a book on <a href="/facts/Finite_field/UkMGJo3m">finite fields</a> chose their exercises freely:<a class="footnote-ref" id="fnref:5" href="#fn:5">5</a>

In order to enhance the attractiveness of this book as a <a href="/facts/Textbook/9sunkH2y">textbook</a>, we have included worked-out examples at appropriate points in the text and have included lists of exercises for Chapters 1 — 9. These exercises range from routine problems to alternative <a href="/facts/Mathematical_proof/7ECDrU80">proofs</a> of key theorems, but containing also material going beyond what is covered in the text.
<a href="/facts/J._C._Maxwell/jtYyze61">J. C. Maxwell</a> explained how exercise facilitates access to the <a href="/facts/Language_of_mathematics/lrmnY5wk">language of mathematics</a>:<a class="footnote-ref" id="fnref:6" href="#fn:6">6</a>

As mathematicians we perform certain mental operations on the symbols of number or quantity, and, proceeding step by step from more simple to more complex operations, we are enabled to express the same thing in many different forms. The equivalence of these different forms, though a necessary consequence of self-evident axioms, is not always, to our minds, self-evident; but the mathematician, who by long practice has acquired a familiarity with many of these forms, and has become expert in the processes which lead from one to another, can often transform a perplexing expression into another which explains its meaning in more intelligible language.
The individual instructors at various colleges use exercises as part of their mathematics courses. Investigating <a href="/facts/Problem_solving/9cuLz5pH">problem solving</a> in universities, Schoenfeld noted:<a class="footnote-ref" id="fnref:7" href="#fn:7">7</a>

Upper division offerings for mathematics majors, where for the most part students worked on collections of problems that had been compiled by their individual instructors. In such courses emphasis was on learning by doing, without an attempt to teach specific heuristics: the students worked lots of problems because (according to the implicit instructional model behind such courses) that’s how one gets good at mathematics.
Such exercise collections may be <a href="/facts/Proprietary_information/VgJ1cAz5">proprietary</a> to the instructor and his institution. As an example of the value of exercise sets, consider the accomplishment of <a href="/facts/Toru_Kumon/k0H5fMDL">Toru Kumon</a> and his <a href="/facts/Kumon_method/cy2wDrBS">Kumon method</a>. In his program, a student does not proceed before mastery of each level of exercise. At the <a href="/facts/Russian_School_of_Mathematics/dXj03e8p">Russian School of Mathematics</a>, students begin multi-step problems as early as the first grade, learning to build on previous results to progress towards the solution.
In the 1960s, collections of mathematical exercises were translated from <a href="/facts/Russian_language/ETXrTgHV">Russian</a> and published by <a href="/facts/W._H._Freeman_and_Company/sJ3zg32G">W. H. Freeman and Company</a>: The USSR Olympiad Problem Book (1962),<a class="footnote-ref" id="fnref:8" href="#fn:8">8</a> Problems in Higher Algebra (1965),<a class="footnote-ref" id="fnref:9" href="#fn:9">9</a> and Problems in Differential Equations (1963).<a class="footnote-ref" id="fnref:10" href="#fn:10">10</a>

<h2 id="history">History</h2>
In China, from ancient times <a href="/facts/Counting_rod/lg4P6zoG">counting rods</a> were used to represent numbers, and arithmetic was accomplished with <a href="/facts/Rod_calculus/vaUgdmpk">rod calculus</a> and later the <a href="/facts/Suanpan/amYHaR1P">suanpan</a>. The <a href="/facts/Book_on_Numbers_and_Computation/eQXdNCPm">Book on Numbers and Computation</a> and the <a href="/facts/Nine_Chapters_on_the_Mathematical_Art/INGLo2Cm">Nine Chapters on the Mathematical Art</a> include exercises that are exemplars of <a href="/facts/Linear_algebra/8VaB4VWk">linear algebra</a>.<a class="footnote-ref" id="fnref:11" href="#fn:11">11</a>
In about 980 <a href="/facts/Al-Sijzi/dYAvH2px">Al-Sijzi</a> wrote his Ways of Making Easy the Derivation of Geometrical Figures, which was translated and published by <a href="/facts/Jan_Hogendijk/eh4J4lx0">Jan Hogendijk</a> in 1996.<a class="footnote-ref" id="fnref:12" href="#fn:12">12</a>
An <a href="/facts/Arabic_language/A1e66hVV">Arabic language</a> collection of exercises was given a Spanish translation as Compendio de Algebra de Abenbéder and reviewed in <a href="/facts/Nature_(journal)/XmlJXkFx">Nature</a>.<a class="footnote-ref" id="fnref:13" href="#fn:13">13</a>
<a href="/facts/Robert_Recorde/fLnLhLnY">Robert Recorde</a> first published <a href="/facts/The_Ground_of_Arts/tu7mDNFH">The Ground of Arts</a> in 1543.<a class="footnote-ref" id="fnref:14" href="#fn:14">14</a>

<blockquote>Firstly, it was almost all exposition with very few exercises — The later came into prominence in the eighteenth and nineteenth centuries. As a comparison we might look at another best seller, namely Walkingame’s Tutor's Assistant, first published in 1751, 70 per cent of which was devoted to exercises as opposed to about 1 per cent by Recorde. The inclusion of exercises was one of the most significant subsequent developments in arithmetical textbooks, and paralleled the development of education as teachers began to make use of <a href="/facts/Textbook/9sunkH2y">textbooks</a> as sources of exercises. Recorde was writing mainly for those who were teaching themselves, scholars who would have no one to check their answers to the exercises.</blockquote>
In Europe before 1900, the science of <a href="/facts/Graphical_perspective/zkNx7Wpf">graphical perspective</a> framed geometrical exercises. For example, in 1719 <a href="/facts/Brook_Taylor/FSF4onDW">Brook Taylor</a> wrote in New Principles of Linear Perspective

[The Reader] will find much more pleasure in observing how extensive these Principles are, by applying them to particular Cases which he himself shall devise, while he exercises himself in this Art,...<a class="footnote-ref" id="fnref:15" href="#fn:15">15</a>
Taylor continued

...for the true and best way of learning any Art, is not to see a great many Examples done by another Person; but to possess ones self first of the Principles of it, and then to make them familiar, by exercising ones self in the Practice.<a class="footnote-ref" id="fnref:16" href="#fn:16">16</a>
The use of <a href="/facts/Slate_(writing)/VIfMglnT">writing slates</a> in schools provided an early format for exercises. Growth of exercise programs followed introduction of written examinations and study based on pen and paper.
<a href="/facts/Felix_Klein/XMILhEfy">Felix Klein</a> described preparation for the <a href="/facts/Entrance_examination/QVhVK0wy">entrance examination</a> of <a href="/facts/%25C3%2589cole_Polytechnique/0DS7aMaR">École Polytechnique</a> as<a class="footnote-ref" id="fnref:17" href="#fn:17">17</a>

...a course of "mathematiques especiales". This is an extraordinarily strong concentration of mathematical education – up to 16 hours a week – in which elementary analytic geometry and mechanics, and recently infinitesimal calculus also, are thoroughly studied and are made into a securely mastered tool by means of many exercises.
<a href="/facts/Sylvestre_Lacroix/wKQoDmtF">Sylvestre Lacroix</a> was a gifted teacher and expositor. His book on descriptive geometry uses sections labelled "Probleme" to exercise the reader’s understanding. In 1816 he wrote Essays on Teaching in General, and on Mathematics Teaching in Particular which emphasized the need to exercise and test:

The examiner, obliged, in the short-term, to multiply his questions enough to cover the subjects that he asks, to the greater part of the material taught, cannot be less thorough, since if, to abbreviate, he puts applications aside, he will not gain anything for the pupils’ faculties this way.<a class="footnote-ref" id="fnref:18" href="#fn:18">18</a>
Andrew Warwick has drawn attention to the historical question of exercises:

The inclusion of illustrative exercises and problems at the end of chapters in textbooks of mathematical physics is now so commonplace as to seem unexceptional, but it is important to appreciate that this pedagogical device is of relatively recent origin and was introduced in a specific historical context.<a class="footnote-ref" id="fnref:19" href="#fn:19">19</a>: 168 
In reporting <a href="/facts/Mathematical_tripos/4LDIeQSR">Mathematical tripos</a> examinations instituted at <a href="/facts/Cambridge_University/0la7aX9o">Cambridge University</a>, he notes

Such cumulative, competitive learning was also accomplished more effectively by private tutors using individual tuition, specially prepared manuscripts, and graded examples and problems, than it was by college lecturers teaching large classes at the pace of the mediocre.<a class="footnote-ref" id="fnref:20" href="#fn:20">20</a>: 79 
Explaining the relationship of examination and exercise, he writes

...by the 1830s it was the problems on examination papers, rather than exercises in textbooks, that defined the standard to which ambitious students aspired...[Cambridge students] not only expected to find their way through the merest sketch of an example, but were taught to regard such exercises as useful preparation for tackling difficult problems in examinations.<a class="footnote-ref" id="fnref:21" href="#fn:21">21</a>: 152 
Explaining how the reform took root, Warwick wrote:

It was widely believed in Cambridge that the best way of teaching mathematics, including the new analytical methods, was through practical examples and problems, and, by the mid-1830s, some of the first generation of young college fellows to have been taught higher analysis this way were beginning both to undertake their own research and to be appointed Tripos examiners.<a class="footnote-ref" id="fnref:22" href="#fn:22">22</a>: 155 
Warwick reports that in Germany, <a href="/facts/Franz_Ernst_Neumann/0F1W6GDG">Franz Ernst Neumann</a> about the same time "developed a common system of graded exercises that introduced student to a hierarchy of essential mathematical skills and techniques, and ...began to construct his own <a href="/facts/Problem_set/LKaWaeaj">problem sets</a> through which his students could learn their craft."<a class="footnote-ref" id="fnref:23" href="#fn:23">23</a>: 174  
In Russia, <a href="/facts/Stephen_Timoshenko/A8x2HG97">Stephen Timoshenko</a> reformed instruction around exercises. In 1913 he was teaching strength of materials at the <a href="/facts/Petersburg_State_University_of_Means_of_Communication/BIf3y0Fy">Petersburg State University of Means of Communication</a>. As he wrote in 1968,

[Practical] exercises were not given at the Institute, and on examinations the students were asked only theoretical questions from the adopted textbook. I had to put an end to this kind of teaching as soon as possible. The students clearly understood the situation, realized the need for better assimilation of the subject, and did not object to the heavy increase in their work load. The main difficulty was with the teachers – or more precisely, with the examiners, who were accustomed to basing their exams on the book. Putting practical problems on the exams complicated their job. They were persons along in years...the only hope was to bring younger people into teaching.<a class="footnote-ref" id="fnref:24" href="#fn:24">24</a>
<h2 id="see-also">See also</h2>
<ul><li><a href="/facts/Algorithm/fnl5NmRt">Algorithm</a></li>
<li><a href="/facts/Worked-example_effect/5y9A9Aqy">Worked-example effect</a></li></ul>

<h2 id="external-links">External links</h2>
<ul><li><a href="/facts/Tatyana_Afanasyeva/gGzdWaAB">Tatyana Afanasyeva</a> (1931) <a href="https://web.archive.org/web/20130401222050/http://www.pims.math.ca/~hoek/teageo/TEA.pdf">Exercises in Experimental Geometry</a> from <a href="/facts/Pacific_Institute_for_the_Mathematical_Sciences/RNP14TKG">Pacific Institute for the Mathematical Sciences</a>.</li>
<li><a href="/facts/Vladimir_Arnold/IMBhyfMS">Vladimir Arnold</a> (2004) <a href="http://imaginary.org/sites/default/files/taskbook_arnold_en_0.pdf">Exercises for students from age 5 to 15</a> at <a href="http://www.imaginary.org">IMAGINARY platform</a></li>
<li><a href="/facts/James_Alfred_Ewing/p5McdTRP">James Alfred Ewing</a> (1911) <a href="https://archive.org/details/examplesinmathem00ewiniala">Examples in Mathematics, Mechanics, Navigation and Nautical Astronomy, Heat and Steam, Electricity, for the use of Junior Officers Afloat</a> from <a href="/facts/Internet_Archive/PHStU8Lo">Internet Archive</a>.</li>
<li>Jim Hefferon & others (2004) Linear Algebra at Wikibooks</li></ul>

<h2 id="references">References</h2>

<ol>
<li id="fn:1">Stephen Leacock "A,B,C – The Human Element in Mathematics", pages 131 to 55 in The Mathematical Magpie (1962) by Clifton Fadiman (editor) Simon & Schuster <a href="/wiki/The_Mathematical_Magpie" target="_blank">/wiki/The_Mathematical_Magpie</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></li>
<li id="fn:2">Alan H. Schoenfeld (1988) "Problem Solving",(see page 85), chapter 5 of Mathematics Education in Secondary Schools and Two-Year Colleges by Paul J. Campbell and Louis S. Grinstein, Garland Publishing, ISBN 0-8240-8522-1 <a href="/wiki/Alan_H._Schoenfeld" target="_blank">/wiki/Alan_H._Schoenfeld</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></li>
<li id="fn:3">Marvin L Bittinger (1981) Fundamental Algebra and Trigonometry, 2nd edition, Addison Wesley, ISBN 0-201-03839-0 <a href="/wiki/Addison_Wesley" target="_blank">/wiki/Addison_Wesley</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></li>
<li id="fn:4">L.J. Goldstein, D.C. Lay, D. I. Schneider (1993) Calculus and Its Applications, 6th edition, Prentice Hall, ISBN 0-13-117169-0 <a href="/wiki/Prentice_Hall" target="_blank">/wiki/Prentice_Hall</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></li>
<li id="fn:5">R. Lidl & H. Niederreitter (1986) Introduction to Finite Fields and their Applications, page viii, Cambridge University Press <a href="/wiki/Cambridge_University_Press" target="_blank">/wiki/Cambridge_University_Press</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></li>
<li id="fn:6">J. C. Maxwell (1890) Scientific Papers of James Clerk Maxwell, volume 2, W. D. Niven editor, page 216, via Internet Archive <a href="https://archive.org/details/scientificpapers02maxwuoft" target="_blank">https://archive.org/details/scientificpapers02maxwuoft</a> <a href="#fnref:6" class="footnote-back-ref">↩</a></li>
<li id="fn:7">Schoenfeld 1988 p 82 <a href="#fnref:7" class="footnote-back-ref">↩</a></li>
<li id="fn:8">D.O. Shklansky, N.N. Chetzov, and I. M. Yaglom, translated by John Maykovich, revised by Irving Sussman, The USSR Olympiad Problem Book, W. H. Freeman and Company <a href="/wiki/I._M._Yaglom" target="_blank">/wiki/I._M._Yaglom</a> <a href="#fnref:8" class="footnote-back-ref">↩</a></li>
<li id="fn:9">D. K. Faddeev & I.S. Sominski, translated by Joel Lee Brenner (1965) Problems in Higher Algebra, W.H. Freeman & Company <a href="/wiki/D._K._Faddeev" target="_blank">/wiki/D._K._Faddeev</a> <a href="#fnref:9" class="footnote-back-ref">↩</a></li>
<li id="fn:10">Aleksei Fedorovich Filippov, translator and editor J.L. Brenner (1963,6) Problems in Differential Equations, W.H. Freeman <a href="/wiki/Aleksei_Fedorovich_Filippov" target="_blank">/wiki/Aleksei_Fedorovich_Filippov</a> <a href="#fnref:10" class="footnote-back-ref">↩</a></li>
<li id="fn:11">Hart, Roger (2010). The Chinese Roots of Linear Algebra. JHU Press. ISBN 9780801899584. <a href="9780801899584" target="_blank">9780801899584</a> <a href="#fnref:11" class="footnote-back-ref">↩</a></li>
<li id="fn:12">Jan Hogendijk (1996) The Ways of Making Easy the Derivation of Geometric Figures by Al-Sijzi <a href="/wiki/Jan_Hogendijk" target="_blank">/wiki/Jan_Hogendijk</a> <a href="#fnref:12" class="footnote-back-ref">↩</a></li>
<li id="fn:13">G. B. Mathews (1917) Compendio de Algebra de Abenbéder from Nature 98:466,7 (#2465). <a href="/wiki/G._B._Mathews" target="_blank">/wiki/G._B._Mathews</a> <a href="#fnref:13" class="footnote-back-ref">↩</a></li>
<li id="fn:14">John Denniss & Fenny Smith, "Robert Recorde and his remarkable Arithmetic", pages 25 to 38 in Gareth Roberts & Fenny Smith (editors) (2012) Robert Recorde: The Life and Times of a Tudor Mathematician, Cardiff: University of Wales Press ISBN 978-0-7083-2526-1 <a href="/wiki/University_of_Wales_Press" target="_blank">/wiki/University_of_Wales_Press</a> <a href="#fnref:14" class="footnote-back-ref">↩</a></li>
<li id="fn:15">Brook Taylor (1719) New Principles of Linear Perspective, Preface, p vi, as found in Kirsti Andersen (1992) Brook Taylor’s Work on Linear Perspective, p 152, Springer, ISBN 0-387-97486-5 <a href="/wiki/Kirsti_Andersen" target="_blank">/wiki/Kirsti_Andersen</a> <a href="#fnref:15" class="footnote-back-ref">↩</a></li>
<li id="fn:16">Taylor p vii, Andersen p 153 <a href="#fnref:16" class="footnote-back-ref">↩</a></li>
<li id="fn:17">Felix Klein, M. Ackerman translator (1979) Development of Mathematics in the 19th Century, p 59, Math Sci Press <a href="/wiki/Felix_Klein" target="_blank">/wiki/Felix_Klein</a> <a href="#fnref:17" class="footnote-back-ref">↩</a></li>
<li id="fn:18">S. F. Lacroix (1816) Essais sur l’enseignement en general, et sur celui des mathematiques en particulier, page 201 <a href="/wiki/S._F._Lacroix" target="_blank">/wiki/S._F._Lacroix</a> <a href="#fnref:18" class="footnote-back-ref">↩</a></li>
<li id="fn:19">Andrew Warwick (2003) Masters of Theory: Cambridge and the Rise of Mathematical Physics, University of Chicago Press ISBN 0-226-87375-7 <a href="/wiki/University_of_Chicago_Press" target="_blank">/wiki/University_of_Chicago_Press</a> <a href="#fnref:19" class="footnote-back-ref">↩</a></li>
<li id="fn:20">Andrew Warwick (2003) Masters of Theory: Cambridge and the Rise of Mathematical Physics, University of Chicago Press ISBN 0-226-87375-7 <a href="/wiki/University_of_Chicago_Press" target="_blank">/wiki/University_of_Chicago_Press</a> <a href="#fnref:20" class="footnote-back-ref">↩</a></li>
<li id="fn:21">Andrew Warwick (2003) Masters of Theory: Cambridge and the Rise of Mathematical Physics, University of Chicago Press ISBN 0-226-87375-7 <a href="/wiki/University_of_Chicago_Press" target="_blank">/wiki/University_of_Chicago_Press</a> <a href="#fnref:21" class="footnote-back-ref">↩</a></li>
<li id="fn:22">Andrew Warwick (2003) Masters of Theory: Cambridge and the Rise of Mathematical Physics, University of Chicago Press ISBN 0-226-87375-7 <a href="/wiki/University_of_Chicago_Press" target="_blank">/wiki/University_of_Chicago_Press</a> <a href="#fnref:22" class="footnote-back-ref">↩</a></li>
<li id="fn:23">Andrew Warwick (2003) Masters of Theory: Cambridge and the Rise of Mathematical Physics, University of Chicago Press ISBN 0-226-87375-7 <a href="/wiki/University_of_Chicago_Press" target="_blank">/wiki/University_of_Chicago_Press</a> <a href="#fnref:23" class="footnote-back-ref">↩</a></li>
<li id="fn:24">Stephen Timoshenko (1968) As I Remember, Robert Addis translator, pages 133,4, D. Van Nostrand Company <a href="/wiki/Stephen_Timoshenko" target="_blank">/wiki/Stephen_Timoshenko</a> <a href="#fnref:24" class="footnote-back-ref">↩</a></li>
</ol>

Exercise (mathematics) open-in-new

Exercise (mathematics)