How to Engage Online Learners in Authentic Assessment
Dianne Conrad, PhD Research Associate Contact North | Contact Nord August 20, 2020
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How to Engage Online Learners in Authentic Assessment Dianne - - PowerPoint PPT Presentation
How to Engage Online Learners in Authentic Assessment Dianne Conrad, PhD Research Associate Contact North | Contact Nord August 20, 2020 1 2 Rudimentary o online l learning q questions usually i include: Whats all the fuss?
Dianne Conrad, PhD Research Associate Contact North | Contact Nord August 20, 2020
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Thank you, Tony Bates
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Authentic assessment: NOT THIS WAY!
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(We
Wedemeyer, d , decades a ago)
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https://www.aupress.ca/app/uploads/120162_99Z_Kennepohl_Shaw_2 010-Accessible_Elements.pdf
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Online l learning r requires a a p paradigm s shift The “ “lone r ranger” a approach ( (Moore) d does n not s suffice Strong d disciplinary k knowledge d does n not e equal p pedagogical kn knowledge New r roles: c : cognitive, s , social, m , managerial a and t technical But t that’s ’s a another s story, a , another p presentation. (except f for t the c circus m metaphor)
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Problem It is the 2020 spring melt and Acme Mining Company (AMC) wants to discharge treated water from their new mine. First, they must confirm that the water from their conventional treatment plant meets the government criteria for total phosphorus, a concentration of 0.5mg/L. Phosphorus is a regulated contaminant because it is a nutrient that causes algae blooms in surface waters that can lead to fish kills. AMC samples their treated water and finds that the phosphorus concentration is 0.75mg/L, so they cannot discharge it. This is a serious matter, as snow is melting and their pond is filling up; they need to begin discharge as soon as possible. AMC investigates sources of phosphorus in their influent. They find that phosphorus is present in two forms. 1) about 5% of the phosphorus is present as a simple phosphate molecule from domestic sewage; and 2) the rest of the phosphorus is present as a complex, biodegradable molecule used in the mining process where the phosphate is bound up in a sulfur compound. Next, Acme bench tests the ability of their conventional treatment plant to remove phosphorus from these two sources individually. They find that they are able to remove 100% of the simple phosphate molecule with their conventional treatment plant. They find that they are not able to remove any of the biodegradable phosphate-sulfur compound.
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What are the Available Solutions? Option 1: Deploy a reverse osmosis unit to act like a "molecular sieve" to remove "everything" in the water, including the problematic contaminants. The waste product from this process is a comparatively small stream of concentrated contaminants, or "brine," that is rejected from the reverse osmosis unit and this has to be managed carefully so as to not create a second problem in the pond. Option 2: Wait for natural degradation of the phosphate-sulfur compound. This could be problematic because the pond where the snowmelt drains is small and the timeframe for natural degradation is not certain. Option 3: modify the conventional treatment plant to include an oxidation pre-treatment that will quickly degrade and break down the phosphate-sulfur molecule, which will liberate the simple phosphate so it can then be removed by their downstream conventional treatment plant process. To achieve the oxidation, common processes are intense aeration, ozone, hydrogen peroxide, potassium permanganate or ultraviolet light. With the peroxide and permanganate solutions, they will have to carefully consider any residual products that may be imparted into the treated water. Group Discussion OR …..
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You h have u ultimate c control i in d determining w where y your l learners w will “end u up,” ,” v via w weighting
Ask y yourself: f:
assignment/activity?
idea: Lots of small tasks with 5 or 10% weightings
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“Don’t ’t r relegate y yourself t to b becoming a a g gatekeeper!” ( (Brookfield, 1 , 1990)
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