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Part 4 of a mini series. In this lesson students look at the amazing concept and skill of using 'iteration' (loops) in programming. We start out by examining the repetition in the mandelbrot set. Coding tasks and demonstrations given for understanding for loops in turtle, and the creation of patterns, as well as completing a mini quizzing system complete with a login system (with limited tries) and scored questions. You can download the powerpoint here and please watch the video before you attempt the test.