Worked-out examples are often used to demonstrate the procedural tasks needed to obtain a solution. If presented effectively, worked examples can also address metacognition skills needed to solve novel problems.
Teaching problem solving is tough. There are many of lists depicting problem solving processes available for educators to use to teach problem solving skills. Most of the lists are based on the work of George Polya (1887 – 1885) who believed that the skill of problem solving should be taught. He identified four principles that form the basis at solving a problem:
1. Understand the problem
2. Devise a plan
3. Carry out the plan
4. Reflect.
My students often grasp the numerical calculations with ease. However, their lack of metacognition skills prohibits them from solving similar problems that may include one or two structural changes.
For example, the other day we were covering percent increase and decrease. Part of the lesson included us working through examples like the following:
a. What is the percent increase from $345 to $689?
Following five or six problems written as above, the students were asked to flip the worksheet over and complete five problems on their own. The following represents the type of problems on the back of the worksheet:
a. Original Amount: $5000
Final Amount: $7800
Find the percent increase.
The students had a very hard time completing the problems on the back of the worksheet on their own. I found this interesting. The second type of problem is seemingly more straightforward. What is it, then, that is keeping the student from being able to solve the problem?
In my opinion the students are lacking mathematical literacy and metacognitive skills. “What is the problem about?” "How is this problem similar or different from problems that have already been solved?” Encouraging students to think this way is a challenge. Designing instruction to support the development of metacognitive skills in students must include careful planning and monitoring by the teacher.
Which makes me question why the idea of teaching with minimal guidance became an issue in the first place? Students struggle with sovling problems on their own. (Why else would we need teachers?) Kirschner, Sweller, and Clark (2006) found that strong instructional guidance rather than constructivist-based minimal guidance was more effective. I believe metacognitive skills instruction can be supported by constructivist-based activities and these activities should be monitored closely by the teacher so that students receive ample support for skill development.



