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Summative assessment- simple machines

The student task : to design a machine that would : a) pop a balloon b) lift a bucket of water c) ring a bell d) push a ball into a hole Criteria: They must must design a machine using atleast 2 simple machines. They have to use IT skills and upload their video on Youtube, generate the embed code and transfer same to blog. Their video must be clear and creative. Though some of these students may be struggling with the language, using correct scientific vocabulary ensures that their presentations are clearly understood.