They are doing maths exercises now.
现在他们正在做数学练习。
Los Altos, a leafy suburb of Silicon Valley, each take a white MacBook from a trolley, log on to a website called KhanAcademy.org and begin doing maths exercises.
Egan初中坐落于硅谷郊外郁郁葱葱的洛斯拉图斯，那里12岁的孩子们选了Courtney Cadwell老师的课程，他们每个人都从手推车里拿一部白色笔记本电脑，然后登陆到KhanAcademy.org网站去做数学题。
Los Altos, a leafy suburb of Silicon Valley, each take a white MacBook from a trolley, log on to a website called KhanAcademy.org and begin doing maths exercises.
Egan初中坐落于硅谷郊外郁郁葱葱的洛斯拉图斯，那里12岁的孩子们选了Courtney Cadwell老师的课程，他们每个人都从手推车里拿一部白色笔记本电脑，然后登陆到KhanAcademy.org网站去做数学题。
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