2019年8月8日 星期四

限制孩子的屏幕使用時間有時並不容易,......延遲早晨上課的時間 對青少年的睡眠質量有明顯益處

紐約時報  智慧生活
• 限制孩子的屏幕使用時間有時並不容易,特別是在面對哭鬧尖叫的寶貝時。時報育兒網站建議家長與孩子一起設定屏幕使用計劃 ;在臨近結束時設置一些有趣的活動,比如逛公園或吃零食;並選擇孩子們可以看到的計時器來計時。
•研究表明, 延遲早晨上課的時間 對青少年的睡眠質量有明顯益處 在西雅圖進行的一項實驗發現,學校推遲上課時間50分鐘,學生的平均睡眠時長增加了34分鐘。部分學生的出勤率和準時率也有所增加。

2019年8月2日 星期五

中國的 Squirrel AI 公司的個人化教學輔導程式

Today, we’re looking at how China is changing education with AI, a call to emphasize more energy-efficient machine learning, and a chess algorithm that learned to play by reading. You can share this issue here, and view our informal archive here. Your comments and thoughts are welcome at algorithm@technologyreview.com.
student
Credit: Noah Sheldon
A month ago, I shared an excerpt of a story that I was working on based on my reporting trip to China. The full piece published today. This is how it begins:
Zhou Yi was terrible at math. He risked never getting into college. Then a company called Squirrel AI came to his middle school in Hangzhou, China, promising personalized tutoring. He had tried tutoring services before, but this one was different: instead of a human teacher, an AI algorithm would curate his lessons. The 13-year-old decided to give it a try. By the end of the semester, his test scores had risen from 50% to 62.5%. Two years later, he scored an 85% on his final middle school exam.
“I used to think math was terrifying,” he says. “But through tutoring, I realized it really isn’t that hard. It helped me take the first step down a different path.”
Experts agree AI will be important in 21st-century education—but how? While academics have puzzled over best practices, China hasn’t waited around. In the last few years, the country’s investment in AI-enabled teaching and learning has exploded. Tech giants, startups, and education incumbents have all jumped in. Tens of millions of students now use some form of AI to learn—whether through extracurricular tutoring programs like Squirrel’s, through digital learning platforms like 17ZuoYe, or even in their main classrooms. It’s the world’s biggest experiment on AI in education, and no one can predict the outcome.
Silicon Valley is also keenly interested. In a report in March, the Chan-Zuckerberg Initiative and the Bill and Melinda Gates Foundation identified AI as an educational tool worthy of investment. In his 2018 book Rewiring Education, John Couch, Apple’s vice president of education, lauded Squirrel AI. (A Chinese version of the book is coauthored by Squirrel’s founder, Derek Li.) Squirrel also opened a joint research lab with Carnegie Mellon University this year to study personalized learning at scale, then export it globally.
But experts worry about the direction this rush to AI in education is taking. At best, they say, AI can help teachers foster their students’ interests and strengths. At worst, it could further entrench a global trend toward standardized learning and testing, leaving the next generation ill prepared to adapt in a rapidly changing world of work.
As one of the largest AI education companies in China, Squirrel highlights this tension. And as one of the best-poised to spread overseas, it offers a window into how China’s experiments could shape the rest of the world. Read the full story here.