考試與評估研討會18分鐘精華
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文字重溫 highlight transcript:
0241-0938 考試與評做在美國、香港及芬蘭的狀況
(Exam and Assessment) Situation in US, HK and Finland
Situation in the USA
Dr. Stephen Krashen: "The United States Department of Education has an obsession with competition. We’ve got to win, we’ve got to be number one in everything we do.
The Race to the Top increase testing, my estimate, about 20 times what we had before.
The effect of taking a standardized test to predict college achievement, the SAT. The SAT added nothing to the prediction. Teachers’ evaluation of students is the best measure we have.
A heroic movement called Opt-Out. Opt out was begun by parents, public school teachers and a few university professors on zero budget.
It spread by word of mouth. In New York State last year, 20% of the public school students eligible to take the test, did not take the test."
Situation in HK: TSA & PISA
Professor Esther Ho: "Both PISA and TSA are actually system level assessment as I said before, but then during the process we will use this score to identify individual school. So for TSA, the government has individual school ID, so they can really abuse it, not just misuse it, to make school accountable for the percentage correct, report every year to individual schools, but that is not fair, particularly for TSA, because in the primary level, all students are entering their schools by residential criteria, also will have very different family backgrounds.
Actually we have a very comprehensive assessment system if we stop the TSA in this little area, that won’t ruin the whole assessment system. We still have many different kinds of survey to understand the school.
In 2014, a group of international scholar including Stephen Ball, Henry Giroux, wrote an open letter to Andrew Schleicher, the leader of PISA since 2000.
They said, PISA tests are damaging education worldwide.
While standardized testing has been used in many nations for decades, PISA has been contributing to an escalation in such testing and a dramatically increased reliance on quantitative measures.
This emphasizing a narrow range of measurable aspects of education, take the attention away from the less measurable or immeasurable educational objectives like physical, moral, civic and artistic development, our student self-concept, anxiety, all the non-quantifiable items are less emphasized anymore because every three years, when they report these international results, the media always focus on the ranking.
So this kind of assessment regime is controversial if it’s a continual cycle of global testing, it will harm our children and impoverishes our classroom, and even de-skill the teachers, and then also endanger well-being of students and teachers.
I think HK should join the US movement, No Unnecessary Testing, the NUT movement from Stephen, and then really create the space to really nurture the competency, the soft skills, the passion and compassion of our students. And then really review the roles of all kinds of exams and tests on student learning, particularly when the test is hurting children at a very young age, what should we do as responsible adults? These adults are not just about the parents. They include the teachers, school administrators, principals, policy makers and scholars."
Response: Prof. Hau Kit Tai, CUHK: "I think we have a wrong focus because if we want to change the system, we have to work on high stake ones. So in HK in particular, we have to work on the high stake secondary school placement system, which TSA does not serve this purpose. TSA is low stake or no stake system by design.
Response: Legislator Ip Kin Yuen: "KT just say TSA is a low stake testing according to design. But just according to design. We all know that it has become a very highstake assessment in reality. So that is the problem if we do not face this reality, we miss the point."
Mediator: Prof. Stephen Chiu, CUHK: "We don’t want to compare school with factories. But if you have two factories, one has a good output with standard working hours, another one has better output but with a lot of overtime work, which one is the better factory? Which one is more productive.? That’s something that we have to put into context."
How do they test and assess in Finland?
Dr. Kristiina Erkkilä: "There are no national authorities for testing learning outcomes, nor are there any ranking list. Moreover, there is no school inspector. Evaluation of learning outcomes is based on national surveys. The aims are to produce information for both schools and students to develop.
The whole purpose to evaluate is to support learning of a student. And I think who does best is the teachers who are very close by, and the other adults and themselves. We have a strong emphasis on self evaluation, and also evaluation by their peers and by their community, because we also engage the families and the parents in participating in the growing of the child.
We are not perfect and we have problems being a remote country with a lot of darkness and harsh weather. Life is very hard in Finland too, but maybe in different respect. So may I said we try to keep our school a pleasant place and not add to that pressure in schools. "
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發現重力波!
愛因斯坦百年預言證實 清華團隊見證物理新紀元
美國的雷射干涉重力波偵測站於美東時間2月11日上午十時三十分,在美國華盛頓特區以及義大利卡西納 同步召開記者會宣布偵測到重力波。這是人類第一次直接偵測到物理界的聖杯───重力波,更是物理界近百年來最重大的發現之一。國立清華大學光電工程研究所教授趙煦的研究團隊,是唯一參與的臺灣團隊,見證歷史性的一刻。
LIGO位於路易西安那州以及華盛頓州的兩個偵測站,於2015年9月14日國際時間上午9點51分前後相距7毫秒,分別偵測到重力波訊號,並經歷四個月嚴謹的數據檢查而確認。此次偵測到的重力波來源是兩個黑洞的合併,一個黑洞具有29個太陽質量,另一個黑洞具有36個太陽質量,合併時以重力波的形式釋放出相當於3個太陽質量的能量,來源距離地球13億光年,位於南半天。
趙煦教授表示,愛因斯坦於1915年發表廣義相對論,認為重力現象是有質量的物體對時空產生的扭曲,並於1916年預測大質量的物體劇烈運動時,時空的扭曲將以重力波的方式傳播。但愛因斯坦當時認為,遙遠的宇宙中星體劇烈運動產生的重力波傳到地球已太微弱,不可能在地球上偵測到。1974年美國科學家侯斯與泰勒偵測到波霎雙星,並用重力波能量消散解釋波霎雙星週期改變的現象,間接指向重力波的存在,獲得1993年諾貝爾物理獎。在愛因斯坦1916年發表重力波預測的整整一個世紀後,LIGO直接偵測到重力波並且證實,意義格外重大。
趙煦教授指出,此次重力波的發現具有三層重大意義:第一是直接證實重力波的存在;第二是直接觀測到雙黑洞合併的運動;第三是開啟了以重力波為觀測媒介的天文學;未來和電磁波天文學搭配,將大幅擴展人類探究宇宙之窗,對目前天文學、宇宙學的發展具有莫大的意義,人類對大自然的終極探究活動又邁進一大步。
LSC重力波探測網絡包括LIGO干涉儀和GEO600探測器。GEO團隊包括來自德國馬克斯普朗克重力物理研究所(愛因斯坦研究所AEI)、漢諾威萊布尼茲大學與英國格拉斯哥大學、卡迪夫大學、伯明翰大學,其他英國的大學以及西班牙的巴利阿里群島大學。
趙煦教授所領導的清華團隊,包括研究生潘皇緯、郭令智、黃書于、鄭鈞,為唯一參與LIGO科學合作聯盟的臺灣團隊。清華團隊的主要研究工作領域及貢獻,在於降低雷射反射鏡的熱擾動雜訊以提高偵測器的靈敏度,讓觀測儀更能觸及微弱的重力波,並致力於下世代更靈敏的低溫反射鏡的研發。
趙煦教授指出,重力波偵測器的雜訊在100赫茲頻段必須低於10-23,雷射反射鏡是其關鍵組件之一。清華團隊利用自製的離子束濺鍍機以及熱擾動測試設備,致力於LIGO科學合作聯盟的反射鏡多層干涉薄膜的研發工作,並創新的將國家奈米元件實驗室的半導體製程技術引進這項研發工作,使臺灣堅強的半導體製程實力,在下一世代的低溫重力波偵測器研發中提供重要貢獻。清華團隊的研究工作受到科技部以及清華校方的大力支持。
此次重力波的發現與證實,已經撰寫成論文,並已獲《物理評論通訊》(Physical Review Letter)接受。在這個里程碑的論文裡,趙煦教授團隊以及國立清華大學均被列為共同作者,此外,中華民國科技部也被列在致謝名單當中,是我國參與國際合作研究的典範之一。
趙煦教授團隊
99年入學:歐政勳、黃文正、潘皇緯(博)
100年:王薇雅、王順錦、李家暐、謝鎮州
101年:郭令智(博)、莊友杭、宋欣忠
102年:黃書于、鄭鈞
103年(目前碩二):林祈宏、吳孟筠、蘇宏凱
104年(目前碩一):陳信傑、康乃中、何軒宇、許惠真、吳漢
https://www.youtube.com/watch?v=J3Qp7pAuAV0&feature=youtu.be
physical review letter 在 國立清華大學National Tsing Hua University Facebook 的最佳貼文
發現重力波 清大見證愛因斯坦預言
愛因斯坦在1916年發表重力波預測,認定宇宙中星體劇烈運動產生重力波傳到地球太微弱,不可能在地球上偵測到。時隔1世紀,美國「雷射干涉重力波偵測站(LIGO)」直接偵測到重力波並證實,清大研究團隊也代表台灣見證歷史一刻,堪稱物理界百年來最重大發現之一。
清華大學光電工程所教授趙煦帶領研究團隊,在科技部支持下參加美國「雷射干涉重力波偵測站」研究,美東時間11日由LIGO在華盛頓特區及義大利卡西納(Cascina)同步宣布偵測到被譽為物理界聖杯的重力波。
趙煦表示,愛因斯坦於1916年預測大質量的物體劇烈運動時,時空的扭曲將以重力波的方式傳播。但愛因斯坦當時認為,遙遠的宇宙中星體劇烈運動產生的重力波傳到地球已太微弱,不可能在地球上偵測到。
趙煦指出,重力波的發現具有3層重大意義,第一是直接證實重力波的存在,第二是直接觀測到雙黑洞合併的運動,第三是開啟了以重力波為觀測媒介的天文學。
他認為,未來和電磁波天文學搭配,將大幅擴展人類探究宇宙之窗,對目前天文學、宇宙學的發展具有莫大的意義,人類對大自然的終極探究活動又邁進一大步。
清大說,重力波的發現與證實在物理界具指標性意義,研究並已撰寫成論文,獲《物理評論通訊》(Physical Review Letter) 接受。論文中趙煦團隊及清大均被列為共同作者,中華民國科技部也被列在致謝名單當中,是我國參與國際合作研究的典範之一。
http://www.chinatimes.com/newspapers/20160213000309-260107
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