Posted in Math research

Analyzing and explaining mathematical thinking and learning

There are four general perspectives one can analyze and explain mathematical thinking and learning.These views should be seen not as competing but complementing each other. The four are:

  1. Mathematics:  where the focus is on the rules and norms of the mathematical research community.
  2. Mathematics education: where the focus is on the individual and social processes in a community of learners, in and out of the classroom.
  3. Cognitive psychology: where the focus is on the universal characteristics of the human mind and behavior, which are shared across individuals, cultures, and different content areas.
  4. Evolutionary psychology: where the focus is on the evolutionary origins of human cognition and behavior and their expression in “universal human nature.”

 -from Uri Leron and Orit Hazzan in their paper Intuitive and Analytical Thinking: Four Perspectives published in Educational Study of Mathematics (2009) 71:263–278.

Let us differentiate these perspectives in terms of following questions:

What is multiplication?

Mathematically, it is not correct to define multiplication as repeated addition and some mathematicians think we should not teach it that way. You can read about the controversy around this in my post Math War over Multiplication. However, from the cognitive and evolutionary psychology point of view, it is but natural and perhaps to be expected that majority of the young students will make this deduction that multiplication is repeated addition. From the math education perspective of course, teachers are expected to eventually challenge this conception.

Are mathematical errors good or bad? (Errors here actually refers to misconceptions, that is, common errors). The following analysis is from Leron and Hazzan’s paper:

  • The mathematical perspective typically views errors (misconceptions) as bugs, something that went wrong due to faulty knowledge, and needs to be corrected.
  • The mathematics educational perspective typically views errors as partial knowledge, still undesirable, but a necessary intermediate stage on the way towards attaining professional norms, and a base on which new or refined knowledge can be constructed.
  • Cognitive psychologists typically view errors as an undesirable but unavoidable feature of the human mind, analogical to optical illusions, which originate at the interface between intuitive and analytical thinking.
  • Evolutionary psychologists, in contrast, view errors as stemming from useful and adaptive features of human cognition. According to this perspective, people make mistakes (at least of the universal recurring kind) not because of deficiencies in their intelligence or their knowledge but because the requirements of modern mathematics, logic, or statistics clash with their “natural” intelligence.”

For those thinking of doing a research on mathematics thinking and learning, you must be clear about which of these different perspectives you will be analyzing your data and explaining your findings.

Recommended readings for your research:

 

Posted in Math blogs

Math Blog Carnival Submission


Just because BlogCarnival.com is malfunctioning again doesn’t mean math bloggers can’t have fun. As announced, Math and Multimedia Carnival #17 will go live on the 28th of November here at Math for Teaching. Deadline for submission is on the 27th Nov 2011. If you already submitted your articles via blogcarnival.com but did not get acknowledgement, please email your post url and name to mathforteaching@gmail.com so I can include them in this edition.  Thank you.

M4T

 

Posted in Teaching mathematics

Use of exercises and problem solving in math teaching

Mathematical tasks can be classified broadly in two general types: exercises and problem solving tasks. Exercises are tasks used for practice and mastery of skills. Here, students already know how to complete the tasks. Problem solving on the other hand are tasks in which the solution or answer are not readily apparent. Students need to strategize – to understand the situation, to plan and think of mathematical model, and to carry-out and evaluate their method and answer.

Exercises and problem solving in teaching

Problem solving is at the heart of mathematics yet in many mathematics classes ( and textbooks) problem solving activities are relegated at the end of the unit and therefore are usually not taught and given emphasis because the teacher needs to finish the syllabus. The graph below represents the distribution of the two types of tasks in many of our mathematics classes in my part of the globe. It is not based on any formal empirical surveys but almost all the teachers attending our teacher-training seminars describe their use of problem solving and exercises like the one shown in the graph. We have also observed this  distribution in many of the math classes we visit.

The graph shows that most of the time students are doing practice exercises. So, one should not be surprised that students think of mathematics as a a bunch of rules and procedures. Very little time is devoted to problem solving activities in school mathematics and they are usually at the end of the lesson. The little time devoted to problem solving communicates to students that problem solving is not an important part of mathematical activity.

Exercises are important. One need to acquire a certain degree of fluency in basic mathematical procedures. But far more important to learn in mathematics is for students to learn to think mathematically and to have conceptual understanding of mathematical concepts. Conceptual understanding involves knowing what, knowing how, knowing why, and knowing when (to apply). What could be a better context for learning this than in the context of solving problems. In the words of S. L. Rubinshtein (1989, 369) “thinking usually starts from a problem or question, from surprise or bewilderment, from a contradiction”.

My ideal distribution of exercises and problem solving activities in mathematics classes is shown in the the following graph.

What is teaching for and teaching through problem solving?

Problems in mathematics need not always have to be an application problem. These types of problems are the ones we usually give at the end of the unit. When we do this we are teaching for problem solving. But there are problem solving tasks that are best given at the start of the unit. These are the ones that can be solved by previously learned concepts and would involve solutions that teachers can use to introduce a new mathematical concept. This strategy of structuring a lesson is called Teaching through Problem Solving. In this kind of lesson, the structure of the task is king. I described the characteristics of this task in Features of Good Problem Solving Tasks. Most, if not all of the lessons contained in this blog are of this type. Some examples:

  1. Teaching triangle congruence through problem solving
  2. Teaching the properties of equality through problem solving
Click the links for more readings about Problem Solving: