📚 Pearson TDI (Teacher Development Interactive): A Complete Guide to the TEFL Certificate Programme | 培生TDI（教师发展TEFL证书项目）全指南
Pearson TDI, short for Teacher Development Interactive, is an online professional development programme built for teachers of English rather than for learners of English. It is modular, tutor-supported and delivered entirely over the internet: participants watch classroom video, complete interactive tasks, read methodology input, and discuss ideas with peers and an online facilitator. The purpose of the programme is not to improve a teacher's English, but to change the way that teacher plans, teaches and assesses.
培生TDI，全称 Teacher Development Interactive（教师发展互动课程），是培生专为"英语教师"而非"英语学习者"设计的在线教师专业发展项目。它采用模块化结构、配有在线导师、全程网络授课：学员观看真实课堂视频、完成互动任务、阅读教学法材料，并与同伴和在线导师讨论交流。这个项目的目标不是提高教师本人的英语水平，而是改变教师备课、上课与评估的方式。
Because it sits somewhere between a short online course and a formal teaching qualification, TDI is widely misunderstood. Some teachers treat it as a cheap route to a licence; others dismiss it as a certificate that proves nothing. The truth is more interesting, and more useful, than either extreme. This guide explains what TDI actually contains, how it is assessed, where the certificate helps and where it does not, and how to get real classroom value out of every module.
由于TDI介于"短期网课"和"正式教学资格"之间，它常被误读。有的老师把它当成拿到执照的廉价捷径，也有人认为这张证书什么也证明不了。真实情况比这两种极端说法都更有意思，也更有参考价值。本文将说明TDI究竟包含什么、如何考核、证书在哪里有用、在哪里没用，以及如何让每一个模块都产生真实的课堂价值。
1. What Pearson TDI Actually Is | 培生TDI究竟是什么
Pearson TDI is a set of stand-alone online modules on English language teaching methodology. Each module has a single teaching focus, such as listening, speaking, reading, writing, young learners or assessment. Teachers enrol in one module or a package of modules, work through input, video, tasks and discussion, and receive a Pearson certificate for each module completed. When a required sequence of modules is finished, the accumulated hours are typically presented as a TEFL certificate-level credential, which is why the programme is often listed as a "teacher development TEFL certificate project".
培生TDI是一整套彼此独立的"英语教学法"在线模块。每个模块聚焦一项教学能力，例如听力教学、口语教学、阅读教学、写作教学、少儿教学或教学评估。教师可以只报一个模块，也可以报一个模块组合，完成输入材料、视频、任务和讨论后，获得培生颁发的模块证书；当规定的模块组合全部完成，累计学时通常会被呈现为一个"TEFL证书层级"的资质，这也是它常被称作"教师发展TEFL证书项目"的原因。
Three features define the programme. First, it is practice-facing: almost every concept is illustrated with filmed lessons and analysed with the question "what would you do next?" Second, it is tutor-moderated: a real facilitator guides the discussion board rather than leaving learners alone with videos. Third, it is cumulative: skills built in one module are assumed and reused in the next, so a teacher who completes several modules ends up with a coherent methodology rather than a set of unrelated tips.
这个项目有三个特征。第一，面向实践：几乎每个概念都配真实课堂录像，并用"接下来你会怎么做"这一问题进行分析。第二，有导师主持：真实导师会在讨论区引导讨论，而不是把学员丢给视频自学。第三，层层累积：前一个模块建立的能力会在后续模块中被假定并反复使用，因此完成多个模块的老师最终得到的是一套连贯的教学法，而不是一堆互不相关的技巧。
The site's original article on this topic also shares a downloadable PDF introduction to the programme (file name: 培生TDI(教师发展TEFL证书项目).pdf), available at https://aleveler.com/wp-content/uploads/2020/06/tditefl.pdf. That document remains the quickest way to see an official-style module list, structure and hours, and it is best read alongside this guide, because providers update module names and study hours from intake to intake.
本站最初发布这个话题的文章时，还附了一份可下载的项目介绍PDF（文件名：培生TDI(教师发展TEFL证书项目).pdf），地址为 https://aleveler.com/wp-content/uploads/2020/06/tditefl.pdf。这份文件仍然是快速了解官方模块清单、结构与学时安排的最省事方式，建议与本文对照阅读——因为不同批次、不同版本之间，模块名称与学时都可能有调整。
2. Why In-Service Teacher Development Matters | 为什么在职教师发展值得投入
Within a school, the single strongest in-school factor affecting how much students learn is not the textbook, the timetable or the size of the classroom; it is the quality of teaching that happens in front of the learners. Teacher development therefore has a larger effect on outcomes than almost any other investment a school can make, including new hardware.
在一所学校内部，影响学生学习成效最强的校内因素，不是教材、不是课表、也不是教室大小，而是发生在学生面前的教学质量。因此，教师发展对结果的影响力，几乎超过学校能做的任何其他投入，包括采购新设备。
English teaching is also a moving field. Communicative competence, task-based learning, assessment for learning, CEFR alignment, corpus-informed vocabulary teaching and technology-enhanced instruction have all reshaped what a good lesson looks like. A teacher trained fifteen years ago may still be competent but methodologically dated, and dated methodology is rarely visible to the teacher themselves.
与此同时，英语教学本身也在不断演进。交际能力、任务型学习、促进学习的评价、CEFR对齐、基于语料库的词汇教学、技术增强教学，都重新定义了"一节好课"的样子。十五年前受训的老师可能依然胜任，但教学法已经过时，而"过时"这件事，教师本人往往最难察觉。
Finally, structured development leaves a paper trail. Module certificates, hours and reflections form a continuing professional development portfolio that supports promotion, subject-leader applications, international job moves and pay-scale reviews. TDI is designed to produce exactly that kind of evidence, one module at a time.
最后，系统化的进修会留下可查的记录。模块证书、学时与反思笔记共同构成一份"持续专业发展档案"，可用于职称晋升、学科带头人申请、海外求职和薪酬等级评定。TDI的设计目标，正是以一个模块接一个模块的方式，产出这类证据。
3. Programme Structure and Module Map | 课程结构与模块地图
TDI is modular by design. Each module is self-contained and can be taken alone, but the certificate value grows as modules accumulate. The most commonly cited module set covers the four skills, the young-learner context, core methodology and assessment. Exact titles vary by version, so treat the table below as a map of typical content rather than a fixed contract.
TDI在设计上就是模块化的。每个模块自成体系，可以单独报名，但证书价值随模块累积而提升。最常被提到的模块组合覆盖四项技能、少儿教学情境、核心教学法和教学评估。具体名称会随版本变动，因此下表请视为"常见内容地图"，而非固定不变的合同条款。
| Module | 模块 | Core Focus | 核心内容 | Typical Hours | 常见学时 |
| Fundamentals of Teaching English | 英语教学基础 | Lesson frameworks, classroom management, error and correction | 课堂框架、班级管理、错误与纠错 | 20-30 h |
| Teaching Listening | 听力教学 | Sub-skills, authentic audio, pre-, while- and post-tasks | 微技能、真实音频、听前听中听后任务 | 20-30 h |
| Teaching Speaking | 口语教学 | Fluency, interaction patterns, pronunciation support | 流利度、互动模式、语音支持 | 20-30 h |
| Teaching Reading | 阅读教学 | Skills-based reading, intensive vs extensive reading | 技能型阅读、精读与泛读 | 20-30 h |
| Teaching Writing | 写作教学 | Process writing, genre awareness, feedback that works | 过程写作、体裁意识、有效反馈 | 20-30 h |
| Teaching Young Learners | 少儿英语教学 | Child development, routines, songs, stories, energy management | 儿童发展、课堂常规、歌谣故事、节奏管理 | 20-30 h |
| Assessment | 教学评估 | Formative and summative assessment, test design, feedback | 形成性与终结性评价、命题设计、反馈 | 20-30 h |
Because each module is independent, TDI suits two very different users. A teacher who has one specific weakness can take a single module and apply it next week. A school that needs a shared methodological baseline can put a whole team through the same sequence, so that lesson observation and feedback use common vocabulary.
由于模块彼此独立，TDI适合两类截然不同的使用者。有明确短板（例如不会上听力课）的教师可以只报一个模块，下周就能用上；而需要统一教学法基准的学校，可以让整个教研组走同一套模块顺序，这样听课、评课和反馈就能使用共同的语言。
4. Delivery Format and Study Time | 授课形式与学习时长
TDI is delivered asynchronously online. That means input, video and tasks can be completed at any hour, while discussion and tutor feedback follow a weekly rhythm. There are no fixed class times to attend, which is the main reason in-service teachers with heavy timetables can finish it. Expect a practical split of roughly 30% video and reading, 40% interactive tasks and reflection, and 30% discussion writing and tutor response.
TDI采用异步在线授课。也就是说，学习材料、视频和任务可以在任何时间完成，而讨论与导师反馈按周推进。没有必须到场的固定课点，这正是课表繁重的在职教师能坚持学完的主要原因。时间分配大致可参考：约30%为视频与阅读，约40%为互动任务与反思，约30%为讨论写作与导师回应。
A single module usually represents 20-30 study hours spread over several weeks. Those hours are not video-watching hours only: they include reading, task completion, posting and replying in discussion, and short written reflection. Teachers who plan to "watch the videos the night before the deadline" consistently underestimate the writing load and end up submitting rushed, shallow discussion posts, which is exactly the part tutors grade.
单个模块通常代表20-30个学习小时，分散在数周内。这些学时并不只是看视频的时间：它包括阅读、完成任务、在讨论区发帖与回帖，以及简短的书面反思。打算"截止前一晚刷完视频"的老师，总会低估写作量，最后只能提交仓促浅薄的讨论帖——而这恰恰是导师评分的关键部分。
A simple way to plan workload is to decide the completion date first and work backwards:
规划学习量有一个简单方法：先确定完成日期，再倒推安排：
Weekly Hours = Total Module Hours ÷ Number of Weeks Available
For a 25-hour module over 8 weeks, that is roughly 3 hours per week, of which at least half should be discussion and reflection. Teachers who enrol in three modules at once frequently complete all of them badly; spreading them across a year produces a stronger portfolio and a more durable change in practice.
一个25学时的模块放在8周内，约合每周3小时，其中至少一半应投入讨论与反思。同时报三个模块的老师，往往三个模块都完成得很差；把它们分散到一年当中，反而能形成更有说服力的档案，也更能带来持久的教学改变。
5. The Online Tutor and the Learning Community | 在线导师与学习社区
The most underrated part of TDI is the human layer. Each cohort is moderated by an online tutor with classroom experience who reads posts, asks follow-up questions, challenges weak reasoning and connects theory to the realities participants describe. This is what separates a moderated programme from a video library: the feedback loop.
TDI最被低估的部分，是"有人"这一层。每个学习班由一位具备课堂经验的在线导师主持，导师阅读帖子、追问、质疑薄弱的论证，并把理论与学员描述的真实情况连接起来。这正是"有导师主持的课程"与"一个视频库"之间的差别：反馈回路。
Peer discussion is equally valuable in a less obvious way. Because cohorts mix national contexts, a teacher in China can read how a teacher in Brazil handles a class of fifty, and a teacher in Spain can borrow a routine for mixed-ability groups. Methodological confidence often grows faster from reading twelve different solutions to the same problem than from reading one correct answer.
同伴讨论的价值则以一种不那么明显的方式体现。由于同一学习班里学员来自不同国家情境，中国的老师可以看到巴西老师如何应对五十人的大班，西班牙的老师可以借用针对混合能力分组的课堂常规。教学自信的成长，往往来自读到同一个问题的十二种解决方式，而不是读到一个"标准答案"。
Two habits make this layer work. First, post early in the week; late posters receive fewer replies. Second, always include a concrete detail from your own classroom - the level, the class size, the activity that failed - because abstract posts receive abstract responses that help nobody.
让这一层真正发挥作用的两个习惯：第一，在每周早些时候发帖，晚发帖往往得到更少回应；第二，务必写出自己课堂的具体细节——级别、班额、失败的那个活动——因为抽象的问题只会得到抽象的回复，对谁都没有帮助。
6. Assessment, Completion and the Certificate | 考核、完成度与证书
TDI is assessed continuously rather than by a single final exam. Typical components are module tasks, short reflective writing, participation quality in the discussion forum, and an end-of-module review or portfolio piece. There is rarely one high-stakes test; instead, the programme rewards consistent, thoughtful engagement.
TDI采用过程性考核，而非一次性期末考试。常见构成包括：模块任务、简短反思写作、讨论区参与质量，以及模块末的复习测验或作品集任务。通常没有单一的高风险考试，课程奖励的是持续而认真的投入。
On completion, participants receive a Pearson certificate naming the module and the hours. When a required set of modules is finished, the total hours are normally added together and presented as the overall TEFL certificate-level award. The arithmetic is worth stating plainly:
完成课程后，学员会获得培生颁发的证书，注明模块名称与学时。当规定的模块组合全部完成，学时通常会被累加，作为整体TEFL证书层级的资质呈现。这个算术值得写清楚：
Certificate Hours = Σ (Hours of Each Completed Module)
Two practical cautions follow. First, a certificate of completion is not the same as a graded academic qualification; it certifies that you completed moderated training, not that you achieved a particular grade band. Second, hours describe study time, not observed teaching time. Employers and visa authorities care about both, and the second one is where most online certificates are weakest.
由此引出两点实务提醒。第一，"完成证书"与"评分制学术资格"不同：它证明你完成了有导师主持的培训，而不是证明你达到了某个成绩等级。第二，学时描述的是学习时间，而非被观摩的授课时间。雇主和签证机构两者都看，而后者恰恰是多数线上证书最薄弱的地方。
7. Core Methodology You Will Actually Learn | 你将真正学到的核心教学法
Across modules, a consistent methodological spine appears: language is learned through meaningful use, not through explanation alone. Teachers are trained to design lessons that move learners from controlled practice towards freer, personalised production, and to judge when accuracy work and when fluency work is the right priority.
贯穿各模块的是一条一致的教学法主线：语言是通过有意义的运用习得的，而不只是通过讲解。教师被训练去设计那种能把学习者从受控练习推向更自由、更个性化的输出活动，并判断何时该优先处理准确性、何时该优先处理流利度。
You will also meet the standard frameworks and be asked to critique them rather than simply apply them:
你还会接触到标准教学框架，并被要求去批判性地审视它们，而不是机械套用：
- PPP (Presentation - Practice - Production) | 呈现—练习—输出： clear staging for new language, useful for lower levels, criticised for over-controlling the final stage. | 新语言点的清晰分步，适合低级别，但被批评为对最后阶段控制过度。
- TBL (Task-Based Learning) | 任务型学习： meaning first, language focus afterwards; strong for fluency and real communication. | 先意义后语言聚焦，利于流利度与真实交际。
- Scaffolding | 支架式教学： temporary support that is withdrawn as competence grows, closely linked to Vygotsky's zone of proximal development. | 随能力增长而撤除的临时支持，与维果茨基的"最近发展区"紧密相关。
- Assessment for learning | 促进学习的评价： feedback that changes what the learner does next, rather than a mark that closes the conversation. | 能改变学习者下一步行为的反馈，而不是终止对话的分数。
- CEFR alignment | CEFR对齐： describing what learners can do at A1-C2 rather than what they have covered. | 描述学习者在A1至C2各档"能做什么"，而不是"讲过什么"。
The cumulative effect is a shift in vocabulary. Teachers stop saying "I covered the
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