「水龍頭」關上後 誰在沉沒——論暑假與學力流失 《信報教育》
過去十數年，學童自殺、學生功課壓力、精神狀態，乃至書包過重等新聞，經常成為社會焦點。少勞多得的Flip Classroom（翻轉教室）、一人一機的電子學習等，亦相繼成為一時潮流，而內地自2021年「雙減」政策實施以來，功課量被全面限制，如小三至小六書面作業時間不多於60分鐘，初中不多於90分鐘等。不同改革均指向同一目標︰學校角色應予弱化。對學生而言，學校角色最弱的時間，非暑假莫屬。然而，學校淡出後，學生是否真的能盡情享受愉快假期？背後有何隱藏成本？
在西方國家，長假或功課過少對學生的危害已吸引不少學者注意。其中，美國學者Entwisle等提出「水龍頭理論」（Faucet Theory），其研究指出暑假前後學生各學科的能力均倒退一至兩個月不等，並稱之為「夏季失落」（summer loss）。學生倒退程度與家長社經地位（Social economic status, SES）呈負相關，即社經地位愈低，成績倒退愈多。Quinn等學者的後續研究則進一步顯示，數學科能力的倒退最為明顯，閱讀次之。這些學力流失均直接影響社經地位較低的學生的高中完成率及大學升學機會。
近年內地針對各省市盲目減負的評論，亦有相似反思，指出減負迫令學校縮減課時，甚至限制教師給予家課，令基層與中產學生的差異愈來愈大。背後原因就是因為減負增加了課餘時間，令中產家庭的資源優勢突顯出來。中產家庭因應更多空間，投放額外資源於孩子學術訓練或體藝發展之上；基層學生則無拘無束，歲月靜好，直至升學瓶頸出現。
坊間有云︰「世上最恐怖的，就是比你優秀的人比你還努力。」不論學生減負政策，還是因疫情原因長期停課，一旦學校的影響力被壓抑，學生社經地位的優勢便會加倍放大，造成更大的學習差異。在長假後復課的班級中，教師該如何應付這挑戰？趕鴨子上架的學生能否適應新學年的課業？
與此同時，社會各界也應該深刻反思，到底減低學校干預，減少家課負擔，會否影響教育均等？訓練所有孩子自律，是理想；寄望所有孩子自律，卻是否有點妄想？學界不斷追捧一些假設所有孩子自律，完成課前自主學習的教學設計，再「一刀切」地向外推廣，這對下一代會造成什麼影響？每年長假後的學力流失，早已是教育界人所共知的事實，但社會有否發現它對上述問題的啟示？
梁亦華 (2025.08.11). 「水龍頭」關上後 誰在沉沒——論暑假與學力流失，《信報教育》，C04。
When the Faucet Is Turned Off, Who Sinks? — On Summer Holidays and Learning Loss
《Hong Kong Economic Journal》
Over the past decade, public concern has repeatedly turned to student suicide, homework pressure, mental well-being, and even the burden of heavy schoolbags. Alongside this, educational innovations such as the “flipped classroom” and one-device-per-student e-learning have come and gone as policy and pedagogical trends. In mainland China, the introduction of the “Double Reduction” policy in 2021 marked a more explicit attempt to curb academic load, including caps on written homework—no more than 60 minutes for primary upper grades and 90 minutes for junior secondary students. Although these reforms look quite different on the surface, they seem to be moving in a similar direction—gradually reducing the role schools play in students’ everyday learning. And if there is any period when that role is most diminished, it is the summer holiday. The question is what happens when schools step back: do students simply enjoy a more liberated break, or are there costs that remain largely unexamined?
In Western research, the consequences of extended breaks or reduced academic input have long been documented. The “Faucet Theory” proposed by Entwisle and colleagues offers a useful metaphor: academic support flows during term time but is partially turned off during summer. Their findings suggest that students typically lose one to two months of learning across subjects over the summer period, a pattern labelled “summer loss.” Crucially, this decline is not evenly distributed. It is strongly correlated with socioeconomic status (SES): the lower the family background, the greater the learning regression. Subsequent work by Quinn and others further shows that the most pronounced decline occurs in mathematics, followed by reading. Over time, these small learning losses can add up, putting students from less advantaged backgrounds at a real disadvantage—especially when it comes to finishing high school or getting into university.
A similar line of reflection has emerged in recent commentary on “burden reduction” policies across mainland China. Critics have pointed out that reducing instructional time and restricting homework may unintentionally widen the gap between working-class and middle-class students. It’s not hard to see what’s going on here. When school becomes less structured, students simply have more free time—and how that time is used often depends on what their families can provide. Middle-class families are more likely to convert this time into structured enrichment—academic tutoring, music, sports, or other forms of cultivation. By contrast, students from less advantaged backgrounds are more likely to spend this time without systematic guidance, only to encounter sharper educational pressure at later transition points.
There is a popular saying that the most unsettling situation is when those already ahead continue to work harder. Whether through policy-driven “deburdening” or prolonged school closures during the pandemic, once the influence of formal schooling is weakened, socioeconomic advantages tend to become more visible and more consequential. Learning gaps widen not gradually but cumulatively, often becoming most apparent when students return to school after long breaks. Teachers are then left managing classrooms with sharply uneven readiness, while students are abruptly required to readjust to academic routines they have partially drifted away from. Whether these transitions can actually be handled smoothly is still a question schools continue to struggle with.
At a deeper level, this raises a more uncomfortable question about the relationship between schooling, autonomy, and equality. Reducing school intervention and homework load is often framed as a step towards healthier, more self-directed learning. But is it realistic to assume that all children possess equal capacity for self-regulation? Training children to be self-disciplined is an educational ideal; assuming it as a universal starting point may be closer to wishful thinking. Yet contemporary pedagogical design increasingly builds on precisely this assumption, scaling up models of autonomous pre-class learning and applying them broadly across diverse student populations. This raises an important question: what happens when we expect all students to learn in the same way? It’s something that probably needs a closer look.
Learning loss after long holidays is hardly a new discovery in education research. The more pressing issue is whether its implications are being properly absorbed: not only in terms of academic performance, but also in how policy choices may inadvertently reshape inequality itself?
Leung, Y. W. (2025.08.11). When the Faucet Is Turned Off, Who Sinks? — On Summer Holidays and Learning Loss, Hong Kong Economic Journal, C04.
