Let's learn Lesson Four.

让我们学习第四课。

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Lesson Five is as difficult as Lesson Four.

第五课和第四课同样难。

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Lesson Three is much easier than Lesson Four.

第三课比第四课容易多了。

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Lesson four is that phenomenally rich people disagree all the time, which means that in those instances half of them must be wrong despite the seeming omniscience conferred by all those billions.

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"I learned my lesson in four years, " Kronmiller says.

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As IDAHO day is marked by activities in schools, the IDAHO Committee and UNESCO have co-developed a lesson plan which includes four classroom activities for different age groups (primary and secondary level) to address issues of discrimination and homophobic bullying.

UNESCO: WORLDWIDE