Teams of four students make a video illustrating a math problem and its real-world application.
由四名学生组成的小组制作一个视频，说明一个数学问题及其在现实世界中的应用。
The TIMSS focuses on basic math knowledge, while the PISA test assesses students' ability to use their math skills in the real world.
TIMMS主要关注于学生基本的数学知识，而PISA的测试则评定了学生在实际生活当中运用数学技能的能力。
Often unschoolers with no formal training in math acquire mathematics through real world applications or can catch up with formally instructed peers easily.
其实，接受非学校教育的孩子即使没有经过正规的数学课训练，也很容易通过现实生活知识来培养其数学能力，或者很容易赶上那些接受正规培养的同龄人的数学水平。
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