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信心第八次课提纲
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chong huang
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May 25, 2011, 11:44:20 PM
5/25/11
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to ygclub-cs, Breeze Fu
大家好,我先把提纲列出来,大家帮忙看看。
第一节:
1. 拿出一个走4格的逆时针正方形的错误的程序,让学生帮忙找出问题,让程序正确运行。 5‘
move(0)
move()
move()
move()
turn-left()move()
move()
move()
move()
turn-left()move()
move()
move()
move()
turn-left()move()
move()
move()
move()
turn-left()turn-off()
2. 走顺时针正方形的程序该怎么走?让学生上台来亲自演示。 10’
3. 让学生用repeat语句来写这个顺时针正方形的程序。 10‘
4. 学生上机,用repeat走任意大小的正方形。 10-25’
第二小节:
1. 演示一个用move, turn_left完成的 kualan地图。 5‘
2. 怎样用repeat来完成kualan路线? 用def 定义一个kualan,repeat调用kualan。10-15’
3. 上机:让学生自己尝试kualan,完成快的学生用repeat和def来做爬台阶。 10-25‘
4. 复习,介绍if 条件判断语句。
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