Tag Archives: pedagogy

Refraction of Light and T-Gem Principles

One challenge for students is to understand the refraction of light.  For example, when a student observes a straw in a glass of water, the straw looks like it is bending. This is due to the properties of light, but this understanding can be fraught with misconceptions regarding how light behaves. Some interesting misconceptions about light may be that water does not reflect or absorb light but light can go through it, light always passes straight through transparent objects (without changing direction) or that light needs air to travel (Sampson & Schleigh, 2016).

Research notes that although light is an everyday phenomenon that we constantly observe, students often display learning difficulties and hold unscientific understanding on physics concepts of light wave (Srisawadi & Kroothkeaw, 2014). In addition, concepts of light such as its speed and wave length are removed from the range of perceptions of the human senses, and so optics instruction can be subject to interpretation, so there is a need for careful consideration in physics teaching process (Srisawadi & Kroothkeaw, 2014). Computer simulations can broach this divide. As noted, computer simulations can enhance generating relationships and allow students and teachers the opportunity to view trends, variables and visual representation  in more concrete ways which may lead to more accurate conceptual understandings (Khan, 2011).

In order to generate information about this phenomenon the educator can begin an open-ended discussion to find out current concepts about light. Questions such as:

What is light?

Where do you think light comes from?

How does light travel?

This will allow the educator to begin to understand what conceptions and misconceptions the students may hold about light and will also allow the students to begin thinking about the concept. As this discussion is occurring the educator can note responses on chart paper or interactive whiteboard so that ideas can be reviewed as the process of understanding continues. As an educator I would incorporate “accountable talk” which will allow students to defend their ideas and question others about their understandings. Examples of accountable talk would be statements like;

“I wonder why….?

“I see what you are saying (rephrase)”

“What you said made me think….”

Then as an educator I would facilitate a review of the ideas generated in the group discussion through referring and restating the list created by students. I would break this down further into “Our First Ideas about Light” and then create another section for questions we now have about light. This would be labelled “Our Questions about Light”. We would brainstorm some questions that we have. Then I would provide students with appropriate books and internet resources about light. I would also show them a model or a picture of a straw in a glass of water. The straw appears to bend and so I would ask them how they would explain the phenomenon. After they have a chance to read/view this information, I would ask them to work with a partner, independently or in a small group (provide choice) and to draw or create a clay model of their understanding of light.

We would then reconvene and compare our models. I would give students time to explain their models to their peers so that I could continue to assess possible misconceptions. At this point the students may begin to reformulate their understandings based on new learning from their peers. Then we would watch several simulations about light refraction. I would ask the students to consider their previous understandings by asking “Do you need to change your original drawing/model? Or “Do you think you need to modify your original drawing/model?”  Our new understanding would be discussed and a new category would be added to our discussion titled “New Understandings”.

Bending Light Simulations

Refraction in Water Simulation

Bending Light Simulation

 

References

Bending Light. (n.d) Retrieved March 1, 2017, from https://phet.colorado.edu/sims/html/bending-light/latest/bending-light_en.html

Khan, Samia (2011).  New pedagogies on teaching science with computer simulations. Journal of Science Education and Technology 20, 3 pp. 215-232.

Refraction in water. (n.d.) Retrieved February 29, 2017, from https://www.khanacademy.org/science/physics/geometric-optics/reflection-refraction/v/refraction-in-water

Sampson, V., & Schleigh, S. (2016). Scientific Argumentation in Biology [PDF file]. Arlington,Virginia. NSTA Press Book. Retrieved from  http://static.nsta.org/files/PB304Xweb.pdf
Srisawasdi, N. & Kroothkeaw, Supporting students’ conceptual development of light refraction by simulation-based open inquiry with dual-situated learning model. S. J. Comput. Educ. (2014) 1: 49. doi:10.1007/s40692-014-0005-y

Considering WISE Design and Jasper Adventures

Wise research aims to bridge the gap between the research that shows the efficacy of inquiry learning in science and the method in which science is generally delivered. In science specifically it has been found that students have many misunderstandings developed either through experiences, concepts or examples (Linn, M., Clark, D. & Slotta, J., 2003). In order to address these, WISE curriculum projects promote knowledge integration through providing inquiry projects which are flexible, customizable and adaptive. They also believe in sustainability. Through field testing and multiple cycles of trial, adaptation and refinement the inquiry projects are continually honed to meet the specific needs of the students. In this way WISE is a bottom up approach rather than a top down approach and is meeting the educational goal of delivering curriculum in a differentiated way, which is one of the goals of education.

In addition, WISE supports the provision of an instructional pattern to assist students through the inquiry. These include eliciting student ideas, adding ideas to these and supporting the process learning to improve understanding. In this way WISE is able to scaffold the students’ learning in an indirect way, while still providing them with many pathways to reach their conclusions. WISE guides the students through the inquiry project without being prescriptive, which leads to deeper learning.

In addition, WISE project teams are made up of diverse partners so as to provide a more holistic inquiry. These include pedagogical specialists, scientists, teachers, and technology designers. WISE framework design principles include making thinking visible, making science accessible, helping students learn from each other, and  promoting lifelong learning, all goals of 21st century education as well as sound pedagogy.

Further to this, many WISE inquiry projects have been designed with detailed steps for the first inquiry investigation and then providing less detailed steps in subsequent projects. In this way students are able to move from supported learning to more independent pathways. This method is debated. When considering the Jasper Series, the belief that students can develop basic skills in the context of meaningful problem posing and problem-solving activities rather than isolated “targets” of instruction seems to refute this. That being said, the Jasper Series coincides with WISE with its emphasis on complex, problem solving, communication and reasoning and in connecting mathematics to the world outside the classroom. (Cognition and Technology and Technology Group at Vanderbilt, 1992).

Looking at this more closely in WISE design it has been found that students prefer to not have a lot of detail before they begin their inquiry, but rather work well with an  initial page that provides an entry into the disciplinary knowledge and provides hyperlinks for students who wish more detail. In this way, making science accessible may not mean making it simple (Linn et al., 2003). This mirrors the anchored instruction shown in the Jasper Series as well.

Another link between the Jasper Series and WISE seems to be the belief that the educator should be a facilitator rather than the disseminator of information. In WISE an inquiry map helps students work independently on their project with prompts that help guide through process. Teachers can also easily customize the projects to match their curriculum and students.

The flexible, continually changing approach to WISE is based on the need for scientific materials that enable local adaptation along with support from multiple cycles of trial and refinement. Students’ needs and what scientific inquiries which engage them are also closely considered. Providing students with content they are interested in and that may have an impact on them is part of the real-world problem solving that is encapsulated in anchored instruction.  This continual refinement is also found in the Jasper Series. Technology can provide for this, whereas traditional textbooks cannot. Furthermore new technologies can be integrated into WISE and the system itself scaffolds the use of offline activities by providing a project context, a pedagogical framework, and proven curriculum design patterns.

Customizing WISE would be beneficial. If I were to use any of the inquiries I could integrate the climate and realities in Northwestern Ontario or the Canadian Shield. In addition I could integrate information about Lake Superior, one of the largest freshwater lakes in the world, which is situated in Thunder Bay (the students’ hometown). Local flora and fauna could be considered. The seasons and the weather locally could also be integrated. These are just some examples.

Linn, M., Clark, D., & Slotta, J. (2003). Wise design for knowledge integration. Science Education, 87 (4), 517-538.

Cognition and Technology Group at Vanderbilt (1992). The jasper experiment: An exploration of issues in learning instructional design. Educational Technology Research and Development, 40 (1), 65-80.