Lesson Outline
1. Introduction (5 minutes)
Hook: Begin with a question to spark curiosity: “Why don’t cells just mix with their surroundings?”
Engagement: Have students brainstorm ideas in the chat to activate prior knowledge.
2. Structure of the Plasma Membrane (15 minutes)
Slides and Diagrams: Explain the phospholipid bilayer, proteins, cholesterol, and carbohydrates with labeled diagrams.
Fluid Mosaic Model: Use an interactive whiteboard to draw the membrane and highlight its dynamic nature.
3. Interactive Activity: Building the Membrane (10 minutes)
Breakout Rooms: Divide students into small groups and use Jamboard or Padlet to construct a “membrane” by placing digital sticky notes for each component.
Discussion: Each group presents their model briefly, explaining their arrangement.
4. Functions of the Plasma Membrane (15 minutes)
Slides and Discussion: Explain selective permeability, transport, signal transduction, cell recognition, and structural support.
Examples: Ask students to suggest examples of molecules and guess if they need a protein channel or can diffuse freely.
5. Visualization (5 minutes)
Show a brief, engaging video on how substances move across the membrane, focusing on passive vs. active transport.
6. Q&A and Summary (5 minutes)
Review Key Points: Use the chat and polling for a quick recap and answer any lingering questions.
7. Assessment and Homework (5 minutes)
Online Quiz: Use Kahoot or Quizizz to check understanding in real time.
Homework: Assign a labeling worksheet on Google Classroom to identify membrane components and functions.
This online lesson plan includes interactive elements, group work in breakout rooms, and digital assessments to make learning about the plasma membrane engaging and effective.

课程大纲
1. 简介（5 分钟）
吸引点：以一个问题开始，激发好奇心：“为什么细胞不与周围环境混合？”
参与：让学生在聊天中集思广益，以激活先前知识。
2. 质膜的结构（15 分钟）
幻灯片和图表：用标记图表解释磷脂双层、蛋白质、胆固醇和碳水化合物。
流体马赛克模型：使用交互式白板绘制膜并强调其动态特性。
3. 互动活动：构建膜（10 分钟）
分组讨论室：将学生分成小组，使用 Jamboard 或 Padlet 构建“膜”，为每个组件贴上数字便签。
讨论：每个小组简要介绍他们的模型，解释他们的安排。
4. 质膜的功能（15 分钟）
幻灯片和讨论：解释选择性渗透性、运输、信号转导、细胞识别和结构支持。
示例：让学生提出分子的例子，并猜测它们是否需要蛋白质通道或可以自由扩散。
5. 可视化（5 分钟）
展示一段简短、引人入胜的视频，了解物质如何穿过膜，重点关注被动运输与主动运输。
6. 问答和总结（5 分钟）
复习要点：使用聊天和投票快速回顾并回答任何遗留的问题。
7. 评估和家庭作业（5 分钟）
在线测验：使用 Kahoot 或 Quizizz 实时检查理解程度。
家庭作业：在 Google Classroom 上分配标签工作表以识别膜成分和功能。
该在线课程计划包括互动元素、分组讨论室的小组作业和数字评估，以使学习质膜变得有趣且有效。