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How to draw nice and accurate model diagrams?
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Using model diagrams to solve simple problems
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Using model diagrams to solve problems involving total
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Bin gives some marbles to Ron.
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Wei receives some marbles from Ron.
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Bin and Wei give some marbles to Ron
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Bin and Wei receive some marbles from Ron
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Bin receives some marbles from Ron. Wei gives some marbles to Ron.
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Bin gives some marbles to Wei
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Total weight and difference in weight between two marbles
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Weight of an empty container
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Money Not Enough
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Chickens and ducks
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Teddy bears and dolls
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Filling up a tank
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Fraction of a fraction
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Bin, Wei and Ron exchange marbles
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"I not stupid!"
(Warning: Very difficult!)
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Comparing 2 fractions
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A lesson of puppets.
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