Abstract
Till date, there have been different opinions about how resources or scaffolds should be used in a problem-based learning (PBL) curriculum. Some suggest that PBL is less effective and efficient compared to instructional approaches that place a strong emphasis on guidance of the student learning process. Conversely, there are advocates who do believe that PBL does provide an adequate level of scaffolding to facilitate meaningful learning. Scaffolding refers to the provision of ample support to promote learning. According to Saye and Brush (Educational Technology Research and Development 50(3):77–96, 2002), scaffolding can be generally classified into two groups, hard and soft scaffolds. In general, soft scaffolds refer to the teacher’s actions in response to the learner’s efforts when there is a specific need. Examples of such scaffolds in a PBL environment setting would be the facilitator, as well as the formation of small collaborative problem-solving teams. In contrast, hard scaffolds are defined as static supports that are developed based on learner difficulties prior to an assigned task (e.g. solving a problem statement). Worksheets, internet resources and textbooks are instances of such supports that fall under this category. The one-day, one-problem approach in Republic Polytechnic utilizes a combination of various scaffolds varying from hard to soft, in order to promote a holistic learning environment for learners. In this chapter, information pertaining to the different scaffolds currently employed in this process will be shared in greater detail. This chapter also aims to allow readers to gain insights into previous studies related to scaffolds in PBL.
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Appendix A: Example of a Worksheet Scaffold from the Immunology Curriculum, Republic Polytechnic, 2009–2010
Appendix A: Example of a Worksheet Scaffold from the Immunology Curriculum, Republic Polytechnic, 2009–2010
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1.
Judy was cutting some craft paper, when she accidentally cut her finger with the pen-knife. After a few minutes, Judy noticed some redness and swelling of the injured area. The diagram below illustrates the process of inflammation that occurred after the injury. Inflammation is a protective response against injury and infection.
There are different types of injury that bring about inflammation. Match the appropriate examples given below to each of their corresponding type of injury.
Example
Type of injury
Exposure to corrosives
Mechanical
Microbial infection
Chemical
Burn
Physical
A knife cut
Biological
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(a)
Why are the phagocytes able to exit from the capillary as shown in B? Are there additional signals to recruit the neutrophils to the site of injury? (Hint: http://www.youtube.com/watch?v=WEGGMaRX8f0&feature=related, http://www.youtube.com/watch?v=ZUUfdP87Ssg&playnext=1&list= PLE90A38E86B901151)
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(b)
What is the main function of the blood clotting elements?
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(a)
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2.
The table below shows some of the immune cells that are involved in inflammation, as well as their roles in subsidizing inflammation. Fill in the roles of the immune cells shown in the table.
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3.
To aid the recovery of an injury, mediators are released by the immune cells present during the inflammatory process. Complete the table below which shows some of these mediators, their origin and functions.
Mediator
Origin
Function(s)
Histamine
Mast cells
Basophils
Chemotactic factors
Prostaglandins
Cyclooxygenase pathway
Fibrinopeptides
Clotting system
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4.
After 2 days, Judy realized that her injured finger had some pus oozing out from the cut, which indicated the onset of chronic inflammation. Chronic inflammation only occurs if the first stage of inflammatory response persists.
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(a)
What is another commonly used term to denote the first stage of inflammation?
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(b)
Which immune cell(s) is/are mainly involved in chronic inflammation?
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(a)
Going Further
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1.
Too much of a good thing can be bad. What kind of medical condition(s) will chronic inflammation lead to?
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2.
Although development of an effective inflammatory response plays a significant role in the body’s defense, the response can sometimes be harmful. Conditions such as allergies and microbial infections may lead to chronic inflammatory responses. Therefore, some approaches can be used to reduce chronic inflammation. Discuss some of these approaches and the rationale behind using these approaches.
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Choo, S.S.Y. (2012). Scaffolding in Problem-based Learning. In: O'Grady, G., Yew, E., Goh, K., Schmidt, H. (eds) One-Day, One-Problem. Springer, Singapore. https://doi.org/10.1007/978-981-4021-75-3_8
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DOI: https://doi.org/10.1007/978-981-4021-75-3_8
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