PRD：少儿英语学习Web平台产品需求文档

[jacwu]

产品需求文档（PRD）：少儿英语学习Web平台

---

1. 项目概述

1.1 背景与目标

产品背景

• 市场环境：K12英语学习需求持续增长，家长与学校更重视互动性和趣味性线上教育。
• 业务痛点：现有平台多偏成人，缺乏针对儿童认知发展的内容和激励机制，家长难以跟踪学习效果。
• 市场机遇：以游戏化和个性化AI提升学习兴趣，打造安全、趣味、可量化效果的少儿英语平台。

核心目标

• 业务目标：占领K12英语学习线上市场，提高用户活跃与续费率。
• 用户价值：提升英语听说读写能力，激发学习兴趣，家长可实时掌握进度。
• 成功指标：注册儿童用户数、日活/周活、平均学习时长、课程完成率、家长满意度。

1.2 项目范围

本版本交付内容

• 课程模块：分级英语课程，听说读写练习
• 游戏化任务与奖励系统
• 家长管理后台（进度/报告/互动）
• AI口语练习与即时纠错

Out of Scope

• 成人英语内容
• 线下教学功能
• 第三方支付/商城

---

2. 用户与场景

2.1 目标用户画像

用户类型	描述	占比	核心需求
儿童用户（6-12岁）	具备基础认知能力，学习以趣味和成就驱动	80%	游戏式互动、逐步提升英语能力
家长监护人	关注学习效果和安全、希望便捷管理	20%	进度追踪、报告查看、家校沟通

2.2 用户权限矩阵

角色	权限范围	核心功能
儿童用户	课程学习、游戏任务	领取任务、参与课程、解锁奖励
家长	管理后台、数据查看	查看报告、设定学习计划、沟通反馈

2.3 核心使用场景

场景1：课后自主学习

• 触发条件：学校或家长布置任务
• 用户目标：完成课程任务、获得奖励
• 使用频率：日常每晚
• 关键步骤：登录→选择课程→参与互动→获得奖励

场景2：家长查看学习进度

• 触发条件：家长随时或定期登录平台
• 用户目标：了解孩子学习情况并调整计划
• 使用频率：每周
• 关键步骤：登录后台→查看报告→设定新目标

---

3. 功能需求

3.1 功能清单

功能编号	功能名称	功能描述	优先级	关联场景	验收标准
F1	分级课程体系	提供适龄、多层级英语课程	P0	课后自主学习	课程内容符合年龄认知，完成可记录
F2	游戏化激励机制	完成任务获得积分/奖励	P0	课后自主学习	任务完成自动奖励积分，积分可兑换
F3	AI口语练习	实时语音识别与纠错	P1	课程练习	AI自动提示发音问题，并给出纠正建议
F4	家长后台	进度与报告查看，家校互动	P0	家长查看进度	可查看多维度学习数据，支持消息沟通

3.2 详细用例

用例编号：UC1 - 游戏化任务完成

• 前置条件：用户已登录，课程任务已分配
• 触发条件：完成指定任务
• 基本流程：
  1. 用户选择任务
  2. 完成互动学习环节
  3. 获得奖励提示
• 异常流程：
  • 任务中断 → 记录进度，允许下次继续
  • 网络异常 → 提示重试
• 验收标准：
  • GIVEN 分配任务
  • WHEN 用户完成所有步骤
  • THEN 平台发放奖励并记录进度

3.3 用户故事

故事ID	用户故事	验收标准	优先级
US1	作为儿童用户，我希望完成英语学习任务后获得奖励，以保持学习动力	GIVEN分配任务 WHEN完成任务 THEN获得奖励并显示进度	P0
US2	作为家长，我希望能随时查看孩子的学习报告，及时调整计划	GIVEN孩子学习数据 WHEN家长登录后台 THEN显示报告与设置新计划入口	P0

---

4. 非功能需求

4.1 性能要求

• 页面首屏加载：≤1200ms
• 关键操作响应：≤300ms
• AI语音识别延迟：≤800ms
• 支持2000同时在线儿童用户

4.2 安全要求

• 儿童数据加密存储（AES256）
• HTTPS全站加密
• 分级访问控制与实名认证
• 防SQL注入/XSS/CSRF
• 合规：遵守中国未成年人网络安全法规

4.3 可靠性要求

• 平台可用性≥99.9%
• 故障自动切换与数据备份
• 数据一致性，防止丢失
• 7天内可恢复备份

4.5 兼容性要求

• 支持主流浏览器（Chrome, Edge, Safari, Firefox）
• 支持PC与主流平板/移动端
• 支持Windows/macOS/iPadOS/Android

---

5. 风险与依赖

5.1 项目风险

风险类型	风险描述	影响程度	发生概率	缓解措施	负责人
技术风险	AI语音识别准确率低	高	中	选用成熟方案并持续优化	技术负责人
业务风险	用户留存率低	高	中	游戏化激励

[jacwu]

looks cool

[jacwu]

good

[jacwu]

@foundry what's the suggested functions of a english learning web site

[github-actions]

Here’s a compact, practical list of suggested functions (features) for an English-learning website, organized by priority and purpose so you can plan scope and development phases.

Core learning features (must-haves)

• Structured courses and lessons
  • Level-based curricula (A1–C2) with clear learning objectives and progress tracking.
• Interactive lessons
  • Text, images, audio and video; short focused modules (micro-lessons).
• Speaking and listening practice
  • Audio examples, dialogues, and listening comprehension tasks.
• Reading and writing practice
  • Graded readers, cloze tests, writing prompts with model answers.
• Vocabulary training
  • Word lists, flashcards, example sentences, spaced-repetition system (SRS).
• Grammar explanations and exercises
  • Clear rules, multiple practice types (multiple choice, fill-in, error correction).
• Quizzes and assessments
  • Formative checks within lessons and summative tests with scores/certificates.
• User accounts & progress tracking
  • Profiles, saved progress, achievement badges, course completion certificates.

Interaction & feedback (high priority)

• Automated instant feedback
  • Auto-graded exercises and explanations for wrong answers.
• Speech recognition & pronunciation feedback
  • Record-and-compare features, visual pronunciation cues (waveform/pitch), scoring.
• Detailed performance analytics
  • Strengths/weaknesses dashboard, time-on-task, accuracy trends.

Personalization & adaptive learning

• Placement test
  • Auto-assign appropriate starting level.
• Adaptive learning paths
  • Tailor lesson difficulty and review scheduling based on performance.
• Personalized recommendations
  • Next lessons, vocabulary to review, suggested activities.

Live & social features (medium priority)

• Live tutoring / group classes
  • Schedule-one-to-one or group lessons with teachers (video/audio/chat).
• Community & social learning
  • Forums, discussion threads, language exchange pairing, peer review for writing.
• Leaderboards & gamification
  • Points, streaks, levels, badges and friendly competition.

Content & resource management

• Content management system (CMS)
  • Easy authoring and updating of lessons, quizzes and media.
• Multiformat resources
  • Podcasts, videos with subtitles, printable worksheets, transcripts.
• Curriculum mapping & teacher tools
  • Lesson planning, class rosters, assignment distribution.

Usability & accessibility

• Responsive design & mobile-friendly UI
  • Works on phones and tablets; consider native apps later.
• Offline access / downloadable lessons
  • Cached lessons or downloadable audio for practice without internet.
• Accessibility
  • Screen-reader support, adjustable font sizes, captions, high-contrast mode.

Monetization & account types

• Free tier + premium subscription
  • Freemium content, premium features (live classes, advanced analytics, certificates).
• In-app purchases / single-course purchases
• Institutional accounts
  • School/enterprise plans, teacher dashboards and bulk user management.

Security, privacy & compliance

• Secure authentication
  • Email/password, OAuth, optional 2FA.
• Data privacy & GDPR compliance
  • Clear privacy policy, opt-ins for communications, safe storage of recordings.

Admin, QA & operations

• Admin dashboard
  • User management, content approvals, abuse moderation tools.
• Reporting & analytics
  • Usage metrics, revenue reports, course engagement stats.
• Content moderation tools
  • Flagging, reviewer workflows, comment moderation.

Optional advanced features (future / competitive differentiators)

• AI tutor and chatbots
  • Conversational practice, writing feedback, automated explanations.
• Automated essay scoring with feedback
  • Holistic and rubric-based feedback plus revision suggestions.
• Pronunciation visualizers (spectrograms)
• AR/VR immersive conversation scenarios
• Multilingual UI and support for other L1s (to scaffold beginner users)

KPIs to track

• DAU/MAU, retention rate, lesson completion rate, average session length, conversion rate to paid, NPS, improvement in placement test scores.

Suggested phased roadmap

• Phase 1 (MVP): Core courses, interactive lessons, user accounts, quizzes, progress tracking, responsive UI.
• Phase 2: Speech recognition, SRS vocabulary, placement test, basic analytics, mobile optimization.
• Phase 3: Live lessons, community features, advanced personalization, paid plans, AI features.

If you like, I can:

• Draft a prioritized feature roadmap with estimated development effort,
• Create wireframe suggestions for key pages (home, lesson, dashboard),
• Recommend tech stack and third-party services for speech recognition, SRS, payments, and LMS/CMS.

Which of those next steps would help you most?

[jacwu]

@foundry what's the suggested functions of a english learning web site

[github-actions]

Here’s a concise checklist of suggested functions (features) for an English-learning website, based on the product requirements in the uploaded PRD. I grouped them so you can scan by purpose (student-facing, parent/teacher, operations, and technical/non‑functional).

Student-facing learning features

• User accounts & profiles (student accounts, child/parent binding, avatars) — basic auth and parental controls .
• AI-powered placement test (adaptive, multi-skill placement + level assignment and recommended plan) .
• Interactive video lessons with in-video questions, subtitles and resume/offline playback support .
• Game‑based vocabulary modules (level maps, matching, spaced‑repetition review, spelling) .
• AI speaking practice (follow‑read, ASR, phoneme‑level scoring, scenario dialogues, pronunciation correction) .
• Listening training (listen‑and‑choose, gap‑fill, passages, background ear‑training) .
• Graded reading / picture‑book reader (tap‑to‑read, read‑along, comprehension quizzes) .
• Unit tests & auto‑graded quizzes (auto paper generation, instant grading, AI grading for open answers) .
• Progress reports & ability dashboards (daily/weekly/monthly reports, radar charts, shareable images) .
• Habit and engagement mechanics (daily tasks, streaks, achievements, leaderboards, points/coin shop) .

Parent & teacher features

• Parent portal (bind child, view reports, reminders, push notifications) .
• Teacher portal / class management (teacher verification, create/manage classes, assign homework) .
• Homework & grading workflow (assign speaking/homework, AI + manual review, wrong‑question book) .
• Home–school messaging / chat and announcements for teacher–parent communication .

Operations & admin

• Content Management System (course CRUD, question bank, media asset management, review workflow) .
• Analytics & monitoring (user/learning/revenue analytics, real‑time dashboards, A/B testing) .
• Payment & subscription management (one‑time purchases, subscriptions, immediate access after payment) .
• Help & support (FAQ, searchable help center, online support/ticketing) .

Technical & non‑functional requirements

• Multi‑platform support (web + iOS/Android/mini‑apps) and single sign‑ons as needed .
• Performance & availability targets (fast load, CDN for video, API latency goals, high availability) .
• Security & compliance (HTTPS, data encryption at rest, child‑data privacy compliance, RBAC, audit logs) .
• Scalability & roadmap items (MVP → AI enhancements → live classes → teacher ecosystem) — helpful for prioritization and milestones .

If you’d like, I can:

• Turn this into a prioritized MVP feature list (what to build first, with P0/P1/P2 priorities), or
• Produce a simple sitemap / user flow for the website, or
• Expand any one feature into acceptance criteria / UI elements.

Which next step would you prefer?

[jacwu]

@foundry get the detail of user story “US-S003: Interactive Video Lessons” of the kids english learning platform

[github-actions]

Here are the details for user story US-S003 — "Interactive Video Lessons."

Title

• Immersive Video Classroom

User story

• As a student, I want to watch engaging animated video lessons with in-video interactions so that I can learn English in an entertaining way.

Acceptance criteria

• Given a course is selected, when Start Learning is tapped, then the video starts within 3 seconds.
• Given the video is playing, when an interaction point is reached, then the video pauses and a question is displayed.
• Given an interactive question is shown, when the correct answer is chosen, then an encouraging animation and sound are played.
• Given an interactive question is shown, when a wrong answer is chosen, then the correct answer and explanation are shown.
• Given the video is playing, when Pause is tapped, then the video pauses immediately.
• Given the lesson is completed, when returning to the course list, then the lesson is marked as completed and rewards are shown.

Priority and estimate

• Priority: P0
• Estimate: 12 days

Description / functional requirements (core points)

• Provide immersive animated video courses with in-video interactive questions to increase engagement. Key functional features include: video playback with smooth playback and controls, timeline-based interaction points (multiple-choice / drag questions), auto-save progress and resume support, optional bilingual subtitles, and offline download for members.

Key technical notes

• Recommended video codecs: H.264 / H.265 with adaptive bitrate.
• Interaction engine: timeline-triggered events to pause and show questions at set timestamps.
• CDN acceleration and performance goals: first-frame fast load (document notes <1s target for first frame) and video start within the acceptance threshold.

Implementation context

• Interactive video (interaction engine) is planned as a Month‑3 deliverable in the MVP roadmap (core feature development and experience completion phases).

If you’d like, I can:

• Export this as a one‑page spec (PDF/Markdown).
• Create UI flow / mockup suggestions for the in-video interaction UI.
• Break the story into tasks for sprint planning (frontend / backend / QA / content). Which would you prefer?