Bridging British Education Virtual Academy 伦桥国际教育

1v1 CS Review Lesson 1v1 计算机科学复习课

1. Course Basic Information 1. 课程基本信息

Course Name: 0114 CS Henry 课程名称： 0114 CS 亨利课

Topic: Cyber Security Concepts and LeetCode Problem Solving (Best Time to Buy and Sell Stock) 主题： 网络安全概念回顾与LeetCode问题解决（买卖股票的最佳时机）

Date: January 14 日期： 1月14日

Student: Henry 学生： Henry

Teaching Focus 教学重点

Review of fundamental cybersecurity terms (Worm, Spyware, Phishing, DoS/DDoS, IDE, IP/TCP) and practicing advanced algorithm problem-solving in LeetCode.

复习基础网络安全术语（蠕虫、间谍软件、网络钓鱼、拒绝服务攻击、IDE、IP/TCP）以及在LeetCode中练习高级算法问题解决。

Teaching Objectives 教学目标

Student successfully recalls definitions for key cybersecurity concepts. 学生能够成功回忆起关键网络安全概念的定义。
Student demonstrates iterative improvement in complex algorithmic thinking (LeetCode). 学生在复杂算法思维（LeetCode）中表现出持续的改进。
Student correctly identifies primary/secondary storage types and ordering based on speed. 学生能正确识别主要/次要存储类型并根据速度进行排序。

2. Course Content Overview 2. 课程内容概览

Main Teaching Activities and Time Allocation 主要教学活动和时间分配

Cybersecurity Terminology Review (Worm, Spyware, Phishing vs. Pharming, DoS/DDoS): Reviewing definitions for terms like Worm, Spyware, Phishing/Pharming distinction, and DoS/DDoS attacks.

网络安全术语回顾（蠕虫、间谍软件、网络钓鱼 vs. 撞库攻击、DoS/DDoS）： 回顾蠕虫、间谍软件、网络钓鱼/撞库攻击的区别以及DoS/DDoS攻击等术语的定义。

Review: IDE, IP Packets, TCP, and SSL/TLS Handshake: Discussing the function and advantages/disadvantages of IDEs, contents of an IP packet, TCP acknowledgement process, and the SSL certificate validation flow.

回顾：IDE、IP数据包、TCP和SSL/TLS握手： 讨论IDE的功能及优缺点、IP数据包的内容、TCP确认过程以及SSL证书验证流程。

Storage Hierarchy Review (Primary, Secondary, Tertiary) and Speed Ordering: Identifying storage types (RAM, ROM, HDD, SSD, USB, Cache, Register) and ordering them by speed (Register fastest). Detailed discussion on RAM vs. ROM and Heap location.

存储层级回顾（主存、次存、三级存储）与速度排序： 识别存储类型（RAM、ROM、HDD、SSD、USB、缓存、寄存器）并按速度排序（寄存器最快）。详细讨论RAM与ROM的区别以及堆（Heap）的位置。

Review: CPU Bus Architecture and Bit-width: Reviewing the three main buses (Data, Address, Control) and the relationship between CPU architecture bit-width (e.g., 64-bit) and bus width.

回顾：CPU总线架构和位宽： 回顾三种主要总线（数据、地址、控制）以及CPU架构位宽（如64位）与总线位宽之间的关系。

LeetCode Practice: Best Time to Buy and Sell Stock (Medium): Student attempts to solve the stock problem, debugging issues related to profit calculation and handling potential integer overflow (TypeError due to char size in intermediate steps).

LeetCode练习：《买卖股票的最佳时机》（中等难度）： 学生尝试解决股票问题，调试了与利润计算和潜在的整数溢出（中间步骤中char大小导致的TypeError）相关的错误。

Conclusion and Next Steps Discussion: Teacher praises the significant improvement, especially in debugging the LeetCode solution, and suggests continuing with LeetCode problems, possibly transitioning to Python for coding exercises.

总结与后续步骤讨论： 老师称赞了学生显著的进步，尤其是在调试LeetCode解决方案方面，并建议继续进行LeetCode练习，可能将编程语言转换为Python。

Language Knowledge and Skills 语言知识与技能

Vocabulary:
Malware, Propagates, Self-replicating, Spyware, Phishing, Pharming, Denial of Service (DoS), Distributed Denial of Service (DDoS), Integrated Development Environment (IDE), IP Packet, TCP, Acknowledge, Serial, Parallel, SSL (Secure Socket Layer), Certificate Authority (CA), Primary Storage, Secondary Storage, Tertiary Storage, RAM (Random Access Memory), ROM (Read-Only Memory), Heap, Cache, Register, Bus (Data, Address, Control), Accumulator, Program Counter (PC), ALU, Fetch-Decode-Execute cycle, Architecture, Bus Width, Byte.

词汇：
恶意软件, 传播, 自我复制, 间谍软件, 网络钓鱼, 撞库攻击/伪造, 拒绝服务攻击, 分布式拒绝服务攻击, 集成开发环境, IP数据包, 传输控制协议, 确认, 串行, 并行, 安全套接字层, 证书颁发机构, 主存储器, 次级存储器, 三级存储器, 随机存取存储器, 只读存储器, 堆, 缓存, 寄存器, 总线（数据、地址、控制）, 累加器, 程序计数器, 算术逻辑单元, 取指-译码-执行周期, 架构, 总线宽度, 字节。

Concepts:
Worm (self-replicating malware), Phishing vs. Pharming (general vs. targeted data theft), DoS vs. DDoS (overloading server), IDE features, IP/TCP connection process, SSL certificate verification flow, Storage hierarchy differences (direct vs. indirect CPU access), RAM/ROM distinction (volatility), Importance of matching CPU architecture bit-width to bus size, CPU internal components (CU, ALU, Registers, Buses).

概念：
蠕虫（自我复制的恶意软件）, 网络钓鱼 vs. 撞库攻击（泛指 vs. 针对性数据窃取）, DoS vs. DDoS（服务器过载）, IDE功能, IP/TCP连接过程, SSL证书验证流程, 存储层级差异（CPU直接访问 vs. 间接访问）, RAM/ROM区别（易失性）, CPU架构位宽与总线大小匹配的重要性, CPU内部组件（CU、ALU、寄存器、总线）。

Skills Practiced:
Verbal recall of technical definitions, Differentiation between similar concepts (Phishing/Pharming), Analyzing complex security protocols (SSL), Categorization and ordering of hardware components by performance, Debugging algorithmic logic errors in a competitive programming context (C++).

练习技能：
技术定义的口头回忆, 区分相似概念（网络钓鱼/撞库）, 分析复杂安全协议（SSL）, 按性能对硬件组件进行分类和排序, 在竞赛编程环境（C++）中调试算法逻辑错误。

Teaching Resources and Materials 教学资源与材料

Instructor's verbal prompts and definitions. 教师的口头提示和定义。
LeetCode problem description (Best Time to Buy and Sell Stock, ID: 121). LeetCode问题描述（买卖股票的最佳时机，ID: 121）。

3. Student Performance Assessment (Henry) 3. 学生表现评估 (Henry)

Participation and Activeness 参与度和积极性

High engagement throughout the review session, demonstrating willingness to attempt difficult recall questions. 在整个复习过程中参与度高，表现出尝试回答困难回忆性问题的意愿。
Active participation during the LeetCode debugging session, driving the solution process. 在LeetCode调试环节中积极参与，推动了解题过程。

Language Comprehension and Mastery 语言理解和掌握

Strong grasp of basic cybersecurity definitions; struggled slightly with the nuance between Phishing and Pharming initially but corrected quickly. 对基础网络安全定义掌握牢固；最初在网络钓鱼和撞库攻击的区别上略有挣扎，但很快得到纠正。
Excellent understanding of storage hierarchy, successfully identifying primary storage types and ordering speeds accurately. 对存储层级有极好的理解，成功识别了主存储器类型并准确排序了速度。

Language Output Ability 语言输出能力

Oral: 口语：

Answers are generally clear, though the student sometimes needs prompting to include all key components of a definition (e.g., self-replicating for Worm). 回答通常清晰，尽管学生有时需要提示才能包含定义的所有关键部分（例如，蠕虫的“自我复制”）。
Excellent communication during the complex debugging process on LeetCode, articulating changes in strategy clearly. 在复杂的LeetCode调试过程中沟通出色，清晰地阐述了策略的变化。

Written: 书面：

The C++ code written during the LeetCode session showed correct implementation attempts but revealed a critical error related to variable type size (char vs. short/int), leading to an unexpected overflow bug.

在LeetCode环节中编写的C++代码显示了正确的实现尝试，但暴露了一个与变量类型大小（char vs. short/int）相关的关键错误，导致了意外的溢出错误。

Student's Strengths 学生的优势

Strong memory for recently reviewed complex topics, especially in CPU architecture and storage hierarchy. 对近期复习的复杂主题记忆力强，特别是在CPU架构和存储层级方面。
Exceptional ability to debug and self-correct algorithmic logic, even under time pressure (LeetCode). 在算法逻辑调试方面表现出卓越的能力，即使在时间压力下也能自我纠正（LeetCode）。
Accurately identified the integer overflow issue (TypeError) in C++ code that the instructor initially missed. 准确识别了C++代码中连老师都差点忽略的整数溢出问题（TypeError）。

Areas for Improvement 需要改进的方面

Need to ensure fundamental definitions are consistently recalled (e.g., making sure to mention 'self-replicating' for a worm). 需要确保基础定义的持续回忆（例如，提到蠕虫的“自我复制”）。
Requires careful attention to data types and potential overflows when coding, particularly in C++. 编码时需要特别注意数据类型和潜在的溢出问题，尤其是在C++中。

4. Teaching Reflection 4. 教学反思

Effectiveness of Teaching Methods 教学方法的有效性

The mixed format (theory review followed by practical coding) proved highly effective for engagement and assessment. 混合模式（理论复习后接实际编码）在提高参与度和评估方面被证明非常有效。
The rapid-fire review session effectively tested retention across diverse CS topics. 快速问答复习环节有效地检验了学生在各种计算机科学主题上的知识保留情况。

Teaching Pace and Time Management 教学节奏和时间管理

The pace for the theory review was fast but appropriate, pushing the student to recall information quickly. 理论复习的节奏很快但很恰当，促使学生快速回忆信息。
The final 25 minutes spent debugging LeetCode was intense but productive, showing the student's capacity for deep focus. 最后25分钟用于调试LeetCode非常紧张但富有成效，显示了学生深度专注的能力。

Classroom Interaction and Atmosphere 课堂互动和氛围

The atmosphere was encouraging, supportive, and intellectually challenging, especially during the debugging part where the student demonstrated great resilience.

课堂氛围是鼓励、支持和智力挑战性的，尤其是在学生表现出极大韧性的调试环节中。

Achievement of Teaching Objectives 教学目标的达成

Objective 1 achieved with high success across multiple technical domains. 目标1在多个技术领域取得了高成功率。
Objective 2 demonstrated significant achievement through the successful debugging process. 目标2通过成功的调试过程得到了显著的实现。
Objective 3 fully achieved during the storage hierarchy review. 目标3在存储层级回顾中得到完全实现。

5. Subsequent Teaching Suggestions 5. 后续教学建议

Teaching Strengths 教学优势

Identified Strengths: 识别的优势：

Effective scaffolding during LeetCode by focusing on the student's logic before addressing syntax/type errors. 在LeetCode中，通过关注学生的逻辑而非语法/类型错误来进行有效的脚手架式指导。
Thorough review covering both high-level concepts (Security) and low-level implementation details (CPU/Storage). 复习内容全面，涵盖了高层概念（安全）和底层实现细节（CPU/存储）。

Effective Methods: 有效方法：

Using 'fill-in-the-blank' or comparison questions (Phishing vs. Pharming, RAM vs. ROM) to force detailed recall. 使用“填空”或比较问题（网络钓鱼 vs. 撞库攻击，RAM vs. ROM）来迫使详细回忆。
Allowing the student to drive the debugging process, providing minimal intervention until necessary. 允许学生主导调试过程，仅在必要时提供最少的干预。

Positive Feedback: 正面反馈：

Praise regarding the student's growth and confidence since previous sessions. 对学生自上次课程以来的成长和自信心表示赞扬。
Acknowledging the student's superior debugging skill when spotting the C++ type issue. 认可学生在发现C++类型问题时的卓越调试技能。

Next Teaching Focus 下一步教学重点

Deep dive into CPU schematic drawing, including all registers (MDR, MAR, IR, PC) and bus connections. 深入研究CPU示意图绘制，包括所有寄存器（MDR、MAR、IR、PC）和总线连接。
Transition coding exercises to Python for better instructor support and clearer type handling. 将编程练习过渡到Python，以便获得更好的教师支持和更清晰的类型处理。

Specific Suggestions for Student's Needs 针对学生需求的具体建议

Computer Architecture & Data Types: 计算机体系结构与数据类型：

Focus on the implications of language choice (C++ vs. Python) on memory management and type safety for future algorithm work. 在未来的算法工作中，关注编程语言选择（C++与Python）对内存管理和类型安全的影响。
Revisit the exact memory structure of the CPU (MDR, MAR, PC, IR) to ensure the schematic drawing is complete next time. 重新回顾CPU的确切内存结构（MDR, MAR, PC, IR），确保下次绘图的完整性。

Cybersecurity Concepts: 网络安全概念：

Create brief flashcards to distinguish between similar concepts like Phishing/Pharming and DoS/DDoS attacker methods. 制作简短的闪卡来区分相似概念，如网络钓鱼/撞库攻击和DoS/DDoS攻击者方法。

Algorithmic Practice: 算法练习：

Continue practicing Medium-level LeetCode problems, focusing on dynamic programming or array manipulation patterns. 继续练习中等难度的LeetCode问题，重点关注动态规划或数组操作模式。

Recommended Supplementary Learning Resources or Homework 推荐的补充学习资源或家庭作业

Review notes on the SSL Handshake process, focusing on the role of the Certificate Authority (CA). 复习SSL握手过程的笔记，重点关注证书颁发机构（CA）的作用。
Attempt another Medium-level LeetCode problem related to arrays or strings. 尝试另一个与数组或字符串相关的中等难度的LeetCode问题。