Introduction to (Mathematical) Problem Solving Dindin Abdul Muiz Lidinillah, S.Si., S.E., M.Pd....
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Transcript of Introduction to (Mathematical) Problem Solving Dindin Abdul Muiz Lidinillah, S.Si., S.E., M.Pd....
Introduction to (Mathematical) Problem Solving
Dindin Abdul Muiz Lidinillah, S.Si., S.E., M.Pd.
Elementary School Teacher Education ProgramEducation University of Indonesia – Tasikmalaya Campus
What Is Problem ?
A Problem is a situation, quantitative or otherwise, that confront an individuals or groups of individual, that requires resolution, and for which the individual sees no apparent or obvious means or path to obtaining a solution
(Stephen Krulik and Jesse A. Rudnick, Teaching Reasoning and Problem Solving in Elementary School, 1995)
What Is Problem ?
You (personally) have a problem if the following four conditions are satisfied:1.You have a clearly defined given initial
situation.2.You have a clearly defined goal (a desired
end situation). Some writers talk about having multiple goals in a problem. However, such a multiple goal situation can be broken down into a number of single goal problems.
Dave Moursund, Improving Math Education in Elementary Schools: A Short Book for Teachers, 2005
What Is Problem ?
3. You have a clearly defined set of resources that may be applicable in helping you move from the given initial situation to the desired goal situation. These typically include some of your time, knowledge, and skills. Resources might include money, the Web, and the telephone system. There may be specified limitations on resources, such as rules, regulations, guidelines, and timelines for what you are allowed to do in attempting to solve a particular problem.4. You have some ownership—you are committed to using some of your own resources, such as your knowledge, skills, time, and energy, to achieve the desired final goal.
What Is The Kind of (Math) Problem ?
Mathematical tasks or activities come in a variety of guises: investigations, projects, traditional story sums, real-life problems, abstract problems, puzzles, etc. Were all of these suitable for learning through solving problems, or were some more suitable than others?
Hanlie Murray, Alwyn Olivier and Piet Human, Learning Through Problem Solving, University of Stellenbosch, South Africa
What Is The Kind of (Math) Problem ?
Routine Non Routine
Well Structured Problems
Ill Structured Problems
Moderately StructuredProblems
Closed Problem
Open Problem
What Is The Kind of (Math) Problem ?
Routine Problems Non Routine Problems
Real life problem Complex problem
Involve one mathematical operation
Require more than one mathematical operation
Basic skills and sequence steps
Using critical and creative thinking Skills
Need understanding, retrieveinformation, choose the operation and algorithms
Need understanding, retrieveinformation, choose the operation and algorithms
Solving through story telling and relate it to real situation
Various strategies and methods to solve it
What Is The Kind of (Math) Problem ?
Type of Problem
Well Structured Problems
Moderately StructuredProblems
Ill Structured Problems
Definition Problems that always use the same step-bystep solution.
Problems that require varying strategies andadaptations to fit particular Contexts
Problems with vague and unclear goals. Solution strategies least Constrained
Characteristics
Solution strategy is usually predictable
Convergent (one right answer)
All starting information is usually part of the problem statement
Often more than one acceptable solution strategy.
Convergent (one right answer).
Needed information often must be gathered.
Solution is not well defined or predictable. Multiple perspectives, goals, and solutions.
There is no single well-defined and agreed-upon solution; There may not be a fully satisfactory solution at all.
Needed information often must be Gathered
What Is Problem Solving ?
It (problem solving) is the means by wich an individual uses previously acquired knowledge, skills, and understanding to satisfy the demands of an unfamiliar situation.
(Stephen Krulik and Jesse A. Rudnick, Teaching Reasoning and Problem Solving in Elementary School, 1995)
What Is Problem Solving ?
Problem solving means engaging in a task for which the solution method is not known in advance. In order to find a solution, students must draw on their knowledge, and through this process, they will often develop new mathematical understandings. Solving problems is not only a goal of learning mathematics but also a major means of doing so.
NCTM 2000, Principle and Standards for School Mathematic. Virginia : NCTM.
What Is Problem Solving ?
Problem-solving : being able to solve mathematical problems occurring in daily life, workplace and in other subject-matters; being able to use athematical language to express, communicate and form Mathematical thinking.
(MOE 2000), In Dave Moursund, Improving Math Education in Elementary Schools: A Short Book for Teachers, 2005
What Is Problem Solving ?
Problem Solving as a Goal
Problem Solving as a Process
Problem Solving as a Basic Skill
What Is The Goals of Problem Solving ?
The Goals of Mathematical Education (Polya, 1969) is a talk that he gave to a group of elementary school teachers.To understand mathematics means to be able to do mathematics. And what does it mean doing mathematics? In the first place it means to be able to solve mathematical problems. For the higheraims about which I am now talking are some general tactics of problems—to have the right attitude for problems and to be able to attack all kinds of problems, not only very simple problems,which can be solved with the skills of the primary school, but more complicated problems of engineering, physics and so on, which will be further developed in the high school.
What Is The Goals of Problem Solving ?
But the foundations should be started in the primary school. And so I think an essential point in the primary school is to introduce the children to the tactics of problem solving. Not to solve this or that kind of problem, not to make just long divisions or some such thing, but to develop a general attitude for the solution of problems.
Polya, George (1969). The goals of mathematical education. In Dave Moursund, Improving Math Education in Elementary Schools: A Short Book for Teachers, 2005
What Is The Goals of Problem Solving ?
Learning occurs when students grapple with problems for which they have no routine methods. Problems therefore come before the teaching of the solution method. The teacher should not interfere with the students while they are trying to solve the problem, but students are encouraged to compare their methods with each other, discuss the problem, etc.
Hanlie Murray, Alwyn Olivier and Piet Human, Learning Through Problem Solving, University of Stellenbosch, South Africa
Some of Issues about Teaching PS ?
• The role of the teacher • The classroom culture • Interaction patterns among students• The kind of problem posed• The mathematical structure of the problem • Sustained learning• The type of response elicited from the student • Teacher awareness, understanding and co-operation • Informing the larger community
Hanlie Murray, Alwyn Olivier and Piet Human, Learning Through Problem Solving, University of Stellenbosch, South Africa
Some of Issues about Teaching PS ?
Teaching Mathematics Through (via) Problem Solving (as a Process of Learning
or Thinking Process)
Teaching Problem Solving (as a Goal or a Basic Skill)
Definition of Heuristic
”Heuristic will be used here to mean a general suggestion or strategy, independent of any particular topic or subject metter, that helps problem solver approach and understand a problem and efficiently marshal their resources to solve it.”
Types of Heuristic in Math
Search for PatternDraw a FigureFormulate an equivalent problemModify the problemChoose effective notationExploit symmetryDivide into casesWork backwardArgue by contradictionCheck for parityConsider extreme caseGeneralizeSickafus, Heuristics for Technical Problem Solving, 2004
Four Steps Polya’s Model
Understanding The Problem (SEE)
Devising a Plan (PLAN)
Carring Out The Plan (DO)
Looking Back (CHECK)
Artzt & Armour-Thomas’s Model
Reading
Understanding
Analisys
Exploration
Planning
Implementation
Verification
Wickelgren’s Model
Analyzing and understanding a problem
Designing and planning a solution
Exploring solution to difficult problem
Verifying a solution
Krulik dan Rudnik’s Model
Read and Think
Explore and Plan
Select a Strategy
Find an Answer
Reflect and Extend
Read and Think
Identify the facts
Identify the question
Visualize the situation
Describe the setting
Restate the action
Explore and Plan
Organize the information
Is there sufficient information ?
Is there to much information ?
Draw a diagram or construct a model
Make a chart, a table, a graph, or a
drawing
Select a Strategy
Pattern recognition
Working backwards
Guess and test
Simulation or experimentation
Reduction and expansion
Organized listing/ exhaustive listing
Logical deduction
Divide and conquer
Find an Answer
Estimate
Use computational skills
Use algebraic skills
Use geometric skills
Use a calculator when appropriate
Reflect and Extend
Check your answer
1) Is the computation correct ?
2) Is the question answered ?
3) Is the answer reasonable ?
4) How does the answer compare with your estimate ?Find alternate solutionWhat if… ?Extend to either : 1) generalization; 2) a
mathematical conseptDiscuss the solutionsCreate interesting variations on the
original problem
How to Asses Math Problem Solving ?
Reys, et.al. (1989) Observation Inventory and Checklist Paper and Pencil Test
Krulik dan Rudnik (1995) Observation Metacognitive Journal Summary Paragraph Test Portofolio
Teaching Models that Related with PS
Mathematical Investigation
Mathematical Exsploration
Problem Posing
Scaffolding
Problem Based Learning
Open Ended Problem
Metacognitive