An example for teacher training – method of

changing sides Language teaching in subjectmatter An example mathematical word problem grade 9 On an insect collecting project Lizzy caught mudwasps Izzy caught waterbugs and Dizzy caught flies It was observed that three times the number of mudwasps that Lizzy caught less 14 was equal to the difference between the number of flies Dizzy caught and the number of waterbugs Izzy caught In addition it was observed that the sum of the mudwasps caught by Izzy and the waterbugs caught by Lizzy was 10 less than three times the flies caught by Dizzy On further examination of the collection it was seen that three times the number of waterbugs caught by Izzy plus the difference between the number of mudwasps caught by Lizzy and the number of flies caught by Dizzy was 16 How many mudwasps did Lizzy collect

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