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共有 129 篇文章

HKDSE Maths | Quadratic equations and the discriminant teaching guide | delta = 16, roots 1 and 5, k = plus or minus 6

Tutor lesson-prep guides · Secondary maths Students can use the formula, then freeze when a question asks for the range of k. The fix is to treat the discriminant as a switch. Two numbers, delta = 1……

2026-11-03

DSE 数学|二次方程与判别式 备课指引(导师用)|Δ=16、根 1 与 5、k=±6 三条界线

导师备课指引 · 中学数学 学生识用公式,但一见“求 k 的范围”就停手,因为他们未把判别式当成开关。这一堂用 Δ=16 与 k=±6 两个数字,把三种情况变成可背可用的判断。 本堂目标 学生能够:① 用因式分解、配方法……

2026-11-03

HKDSE Chemistry | Chemical equilibrium and Le Chatelier teaching guide | Kc = 64, 80% conversion, 15% Haber yield

Tutor lesson-prep guides · Secondary chemistry Students can recite that rates become equal at equilibrium, then plug the initial moles straight into Kc. One set of numbers, 0.50 and 0.50 going to 0.……

2026-11-03

DSE 數學|二次方程與判別式 備課指引(導師用)|Δ=16、根 1 與 5、k=±6 三條界線

導師備課指引 · 中學數學 學生識用公式,但一見「求 k 的範圍」就停手,因為他們未把判別式當成開關。這一堂用 Δ=16 與 k=±6 兩個數字,把三種情況變成可背可用的判斷。 本堂目標 學生能夠:① 用因式分解、配方……

2026-11-03

DSE 化学|化学平衡与勒沙特列原理 备课指引(导师用)|Kc=64、转化率 80% 与哈伯法 15% 产率

导师备课指引 · 中学化学 学生识背“平衡时正逆反应速率相等”,但一做 ICE 表就把初始摩尔数当成平衡浓度。这一堂用一组 0.50、0.50、0.80 的数字,把 Kc 从定义做到 64,再回头解释工业为何要牺牲产率。 本堂目标……

2026-11-03

DSE 化學|化學平衡與勒沙特列原理 備課指引(導師用)|Kc=64、轉化率 80% 與哈伯法 15% 產率

導師備課指引 · 中學化學 學生識背「平衡時正逆反應速率相等」,但一做 ICE 表就把初始摩爾數當成平衡濃度。這一堂用一組 0.50、0.50、0.80 的數字,把 Kc 從定義做到 64,再回頭解釋工業為何要犧牲產率。 本堂目……

2026-11-03

DSE History | Eastern Europe 1989-2004 Lesson-Prep Guide (Tutor Edition) | Timeline Chains, Three-Country Comparison and NATO and EU Enlargement

Tutor lesson-prep guides · Secondary History Students can recite that the Berlin Wall fell but cannot say why Poland negotiated while Romania bled. This lesson splits 1989 into comparable cases with……

2026-11-02

DSE ICT | Cloud Computing and Virtualisation Lesson-Prep Guide (Tutor Edition) | IaaS, PaaS and SaaS Lines, Host and Cost Arithmetic, SLA Downtime

Tutor lesson-prep guides · Secondary ICT Students say they will move to the cloud but cannot say how many hosts, what it costs, or how many minutes a year it will be down. This lesson makes cloud a ……

2026-11-02

DSE Geography | Urban Climate and Air Pollution Lesson-Prep Guide (Tutor Edition) | Heat Island Arithmetic, Corridor Planning and Pollutant Comparison

Tutor lesson-prep guides · Secondary Geography Students say the city is hotter and the air worse but cannot say by how much. This lesson turns two monitoring readings into a chain of cause and effec……

2026-11-02
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