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How harmful is the sun?
Skin cancer seems to be the disease of the 21st century. And that is largely the sun's fault. Do we know well enough how to protect our skin? And what dangers does the sun still have in store? Professor Vera Rogiers is a toxicologist at the VUB. …
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Fractions of numbers to 100
Petal fractures work on:
- parts of the fracture;
- same fractions
- fractions.
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Downloadable resource (57)Student (teacher training)