The title "Condition an action" lead a student to assume that an "action" is something special.
Multiple students did not understand what they should write. "Let’s try to make our turtle stop when it reaches the end of the window" and "We want the turtle to go forward for a specified distance" seemed to contradict each other.
Even if using the official solution, you could not see that the turtle stayed inside the window. So correct and wrong solutions looked the same. (see #13)
There were multiple problems with http://opentechschool.github.com/python-beginners/en/conditionals.html#condition-an-action