16.08.2013 Views

Teacher Learning in a Community of Practice: A Case Study of ...

Teacher Learning in a Community of Practice: A Case Study of ...

Teacher Learning in a Community of Practice: A Case Study of ...

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

John succeeded <strong>in</strong> draw<strong>in</strong>g on the spend<strong>in</strong>g behaviour <strong>of</strong>one <strong>of</strong>his pupils to establish a<br />

pattern <strong>of</strong>purchas<strong>in</strong>g that was likely to occur. He developed a table that reflected that<br />

more packets <strong>of</strong>chips would be purchased at lower prices and fewer packets at higher<br />

prices. He then went onto to refer to the concept 'demand' by say<strong>in</strong>g that at each price,<br />

the quantity that would be demanded would be different. The word 'quantity' was written<br />

on the board. John helped pupils bra<strong>in</strong>storm the mean<strong>in</strong>g <strong>of</strong>the word, eventually com<strong>in</strong>g<br />

to the conclusion that it meant the amount or the number <strong>of</strong>items.<br />

John appeared to be much more relaxed <strong>in</strong> this lesson and tolerated and dealt with<br />

distractions <strong>in</strong> a firm yet reassur<strong>in</strong>g manner. The lesson proceeded with John hand<strong>in</strong>g out<br />

a worksheet. The worksheet presented the def<strong>in</strong>ition <strong>of</strong>the term 'demand', and a demand<br />

schedule for an imag<strong>in</strong>ary pupil's (Jay) demand for coke.<br />

Extract <strong>of</strong>worksheet and lesson observation notes:<br />

Jay receives a pocket allowance <strong>of</strong> R20 a month.<br />

Price <strong>of</strong> a can <strong>of</strong> Quantity demanded<br />

coke<br />

R2 8<br />

R3 6<br />

R4 4<br />

R5 3<br />

R6 2<br />

Questions:<br />

1. <strong>Study</strong> Jay's demand table for Coke to help you answer the questions<br />

1.1 How many cans <strong>of</strong> coke will Jay buy <strong>in</strong> a month if the price was R2 each?<br />

1.2 How many cans will he buy if they were R4 each?<br />

1.3 Why would he buy more if the price were lower? Write a short explanation.<br />

2. When the price <strong>of</strong> coke is low, will consumers demand a larger or smaller quantity?<br />

3. When the price <strong>of</strong> coke is high, will consumers demand a larger or smaller quantity?<br />

4. Try to expla<strong>in</strong> the relationship between price and demand to your partner. Th<strong>in</strong>k<br />

about scarcity and mak<strong>in</strong>g choices (write it down).<br />

Pupils were allowed 10 m<strong>in</strong>utes to work out their answers. John moved around the class<br />

enterta<strong>in</strong><strong>in</strong>g queries (eg. mean<strong>in</strong>gs <strong>of</strong> the words 'consumers': relationship'). Most pupils<br />

needed help with q4. They appeared to understand the relationship, but struggled to write<br />

it down. After about 12-15m<strong>in</strong>utes, John called for answers from the pupils. Most pupils<br />

176

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!