marie

Reflection 1 - I think an exact number is a number which, when written as a decimal, doesn't go on and on

Teacher feedback - What about one third? This is an exact value. One type of exact values are all rational numbers - those numbers which can be written as ratios ie as fractions. Some fractions can be written as terminating decimals, but not all, however these are still exact values. So all fractions are exact values.

Reflection 2 - What is a surd? I think a surd is a square root ( or cube root) which cannot be evaluated to give a whole number so it is simpler to keep writing them with the square ( or cube) root sign on them

Teacher Feedback - you are on the right track - what about higher order radicals (roots)? Do you think they could be called surds? Are all surds irrational??

Student sample of completed worksheets posted to wiki page











Photostory of worksheets as example of how students may present their investigation

media type="file" key="student sample.wmv"



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