📐 AP Precalculus Course Archive & Video Stream Portal

This repository and backup archive serves as the centralized offline and cloud hub for AP Precalculus (Grade 9). It contains lesson video archives, direct MP4 streaming links, textbooks, worksheets, and answer keys hosted publicly with zero authentication required.

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🌐 Live Web Portal & Repository Details

• GitHub Username: MegaAntony
• Live Website: https://megaantony.github.io/ap-precalc-streams/
• GitHub Repository: https://github.com/MegaAntony/ap-precalc-streams
• Local Git Repo Path: /Users/anish/ap-precalc-streams/
• Backup & Materials Path: /Volumes/Backup/Antony/HighSchool/Grade9/Math/AP Precalculus/

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🔑 GitHub SSH Key & Authentication Details

1. Your Public SSH Key

ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIKNMmVVgIknZ8nylByh9K74/GnaXwQ4gJ/Go24lWEy82 MegaAntony@github

2. Key File Paths on macOS

• Public Key: ~/.ssh/id_ed25519.pub (/Users/anish/.ssh/id_ed25519.pub)
• Private Key: ~/.ssh/id_ed25519 (/Users/anish/.ssh/id_ed25519)
• SSH Config: ~/.ssh/config (/Users/anish/.ssh/config)

3. Quick Terminal Commands

• Copy Public Key to Clipboard:

  pbcopy < ~/.ssh/id_ed25519.pub

• Test GitHub SSH Authentication:

  ssh -T git@github.com

• Re-add Key to macOS Keychain (if ever needed):

  ssh-add --apple-use-keychain ~/.ssh/id_ed25519

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📁 Directory Structure & Existing Units

/Volumes/Backup/Antony/HighSchool/Grade9/Math/AP Precalculus/
├── README.md                                  # Complete course and setup documentation
├── AP_Precalculus_Direct_MP4_Streams.html     # Mirror copy of the stream portal HTML
├── Unit 1 - Unit Circle/
│   ├── Unit_01_all-Lesson_Videos.md           # 12 videos with direct MP4 streams & curl commands
│   ├── Unit_01_Complete_Reference.md          # Textbook links, Worksheets A-D, solution keys
│   └── unit_01_metadata.json                  # Raw parsed Canvas data
├── Unit 2 - Graphing Trigonometric Functions/
│   ├── Unit_02_all-Lesson_Videos.md           # 12 direct MP4 streams for current & older AP lessons
│   ├── Unit_02_Complete_Reference.md          # Worksheets A-F, class graphs, test reviews
│   └── unit_02_metadata.json                  # Raw parsed Canvas data
└── Unit 3 - Inverse & Composite Trigonometric Functions/
    ├── Unit_03_all-Lesson_Videos.md           # Direct MP4 streams for 13 lessons & examples
    ├── Unit_03_Complete_Reference.md          # Worksheets A-E, oblique triangles, test reviews
    ├── unit_03_metadata.json                  # Raw parsed Canvas data for 15 pages
    └── worksheets/                            # 16 offline local PDF worksheets & answer keys
        ├── APPCU03_WkstA_EvalInvFxns.pdf
        ├── APPCU03_WkstA_EvalInvFxns_Answers.pdf
        ├── APPCU03_WkstB_EvalArcTrig.pdf
        ├── APPCU03_WkstB_EvalArcTrig_Answers.pdf
        ├── APPCU03_WkstB_AppsObliqueTriangles.pdf
        ├── APPCU03_WkstB_AppsObliqueTriangles_Answers.pdf
        ├── APPCU03_WkstC_Applications.pdf
        ├── APPCU03_WkstC_Applications_Answers.pdf
        ├── APPCU03_WkstC_ExtraPracSSA.pdf
        ├── APPCU03_WkstC_ExtraPracSSA_Answers.pdf
        ├── APPCU03_WkstD_MorePracticeApps.pdf
        ├── APPCU03_WkstD_MorePracticeApps_Answers.pdf
        ├── APPCU03_WkstD_UnitReview.pdf
        ├── APPCU03_WkstD_UnitReview_Answers.pdf
        ├── APPCU03_WkstE_Review.pdf
        └── APPCU03_WkstE_Review_Answers.pdf

Hosted public repository layout:

/Users/anish/ap-precalc-streams/
├── index.html                                 # Live portal with nav bar, videos & worksheets
└── docs/                                      # Public PDF hosting (bypasses Microsoft / SharePoint login)
    ├── APPCU03_WkstA_EvalInvFxns.pdf
    ├── APPCU03_WkstA_EvalInvFxns_Answers.pdf
    └── ... (16 Unit 3 PDFs)

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📖 Units Breakdown

1. Unit 1 - Unit Circle

• Video Archive: Unit_01_all-Lesson_Videos.md (12 Videos)
  • Standard Position, Radians, Coterminal Angles, Comp/Supp, Unit Circle, Angular/Linear Speed, Quadrant System, Reference Angles.
• Reference & Worksheets: Unit_01_Complete_Reference.md
  • Official Trig Identities Sheet, Blank Unit Circle, Worksheets A–D & Full Answer Keys.

2. Unit 2 - Graphing Trigonometric Functions

• Video Archive: Unit_02_all-Lesson_Videos.md (12 Videos)
  • Khan Academy Sine graphs, ScreenPal lessons 1–5 & 10, Older versions (2.1a–d), Secant/Cosecant, Writing Equations from Graphs.
• Reference & Worksheets: Unit_02_Complete_Reference.md
  • Worksheets A–F (Sine/Cosine, Secant/Cosecant, Tangent/Cotangent, Writing Equations from Graphs, Test Review, Harmonic Applications).

3. Unit 3 - Inverse & Composite Trigonometric Functions

• Video Archive: Unit_03_all-Lesson_Videos.md (13 Videos)
  • Lesson 1: Review of Inverses & Rational Zero Test (Synthetic Division)
  • Lesson 2: Evaluating Arctrig Functions
  • Lesson 3: Composite Trig Expressions, Numeric Only & Variable Ratios
  • Lesson 4: Pythagorean & Reciprocal Identities, SAS & Heron's Triangle Area
  • Lesson 5: Oblique Triangles and Law of Cosines
  • Lesson 6: Law of Sines
  • Lesson 7: Ambiguous Case of Law of Sines & Worked 2-Triangle Example (Mr. O'Connor notation)
• Reference & Worksheets: Unit_03_Complete_Reference.md
  • All 16 PDFs saved locally in worksheets/ and hosted live in docs/ on GitHub Pages.

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🛠️ Case Study: How We Built Unit 3

Step 1: Read Canvas Home Page with 5-Second Delay

Using the student's Canvas session cookie, we scraped https://forsyth.instructure.com/courses/276219 with sleep 5 to avoid bot detection. We parsed the weekly plan (AP Precalc 26/27 Week 7) and discovered Unit 3 was newly active.

Step 2: Query Canvas Modules API

We pulled all module items via:

curl -s "https://forsyth.instructure.com/api/v1/courses/276219/modules?include[]=items&per_page=50" \
  -H "accept: application/json" -b "canvas_session=..."

This returned the exact page slugs for all 7 video lessons and 8 worksheet pages.

Step 3: Scrape All Unit Pages with 5s Delay

A Python script fetched each of the 15 pages with time.sleep(5) intervals and exported unit_03_metadata.json.

Step 4: Extract Direct Video Streams

1. MyVRSpot Videos: Queried the embed player iframe (https://live.myvrspot.com/iframe?v=<ID>) which returned direct, high-res signed CloudFront MP4 stream URLs (https://d1drabmetuo3qr.cloudfront.net/...mp4).
2. ScreenPal Videos: Extracted the direct player stream endpoint (https://go.screenpal.com/player/stream/<ID>), usable with curl -L -H "Referer: ..." or downloadable in-browser.
3. Canvas Studio: Extracted the Studio embed player URLs.

Step 5: Solve the SharePoint Login Issue (Auth-Free PDFs)

• School SharePoint links (forsythk12org.sharepoint.com/:b:/s/SFHMath/...) require Microsoft 365 student login and return HTTP 403 / redirect to Azure AD if accessed by external visitors.
• The Solution: We downloaded all 16 PDFs using the authenticated browser session into a temporary staging folder (/Volumes/Backup/scrap/x/).
• Copied all 16 PDFs to:
  1. /Volumes/Backup/.../Unit 3 - .../worksheets/ (permanent local backup)
  2. /Users/anish/ap-precalc-streams/docs/ (public web hosting)
• Configured index.html buttons to link to ./docs/<filename>.pdf. GitHub Pages serves these as native static files with zero authentication required!

Step 6: Web Portal UI Enhancements

• Added a sticky navigation bar at the top with jump links (#unit-1, #unit-2, #unit-3, and #unit-3-review).
• Added html { scroll-behavior: smooth; } and a JavaScript pulse animation that highlights the selected unit card with a glowing blue border.
• Committed and pushed to main branch:

  cd ~/ap-precalc-streams
  git add index.html docs/
  git commit -m "Publish Unit 3 worksheets and answer key PDFs (auth-free public access)"
  git push

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🚀 How to Add Next Chapters (Unit 4, 5, etc.)

Whenever a new unit is posted on Canvas, follow this standard 4-step workflow:

Step 1: Copy Canvas Cookie & Run Initial Extraction

1. Open Chrome DevTools (Cmd + Option + I) on Canvas -> Network tab.
2. Refresh https://forsyth.instructure.com/courses/276219.
3. Right click the document request -> Copy as cURL.
4. In chat prompt, say:

   "Extract Unit X with 5s delay and update the hosted website"

Step 2: Automatic Scrape & Video Stream Resolution

The assistant will:

1. Fetch https://forsyth.instructure.com/api/v1/courses/276219/modules.
2. Extract all Lesson pages and Worksheet pages for Unit X with 5-second delays.
3. Resolve all MyVRSpot iframes to CloudFront MP4 URLs and ScreenPal stream endpoints.
4. Create the folder: /Volumes/Backup/Antony/HighSchool/Grade9/Math/AP Precalculus/Unit X - <Title>/ containing unit_0X_metadata.json, Unit_0X_all-Lesson_Videos.md, and Unit_0X_Complete_Reference.md.

Step 3: Download Worksheets for Zero-Auth Hosting

To make worksheets public without school login:

1. Open the SharePoint links for Unit X in your browser (since you are logged into Microsoft 365).
2. Download the worksheet PDFs and answer keys (either via browser Save As or into a staging folder like ~/Downloads or /Volumes/Backup/scrap/x/).
3. Tell the assistant:

   "Downloaded Unit X worksheets to . Copy to right folder and publish"

4. The assistant will copy them to docs/ and worksheets/, update the portal buttons to point to the local ./docs/... files, and update Unit_0X_Complete_Reference.md.

Step 4: Publish Live to GitHub Pages

The assistant will commit and push the updates:

cd ~/ap-precalc-streams
git add index.html docs/
git commit -m "Add Unit X lessons, video streams, and auth-free worksheets"
git push

The website at https://megaantony.github.io/ap-precalc-streams/ will update automatically in ~30 seconds.

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💡 Quick Refresh Tip

GitHub Pages sends Cache-Control: max-age=600 (10-minute cache). When viewing a newly published unit, either:

• Press Cmd + Shift + R in your browser.
• Or add a query parameter to the URL (e.g. https://megaantony.github.io/ap-precalc-streams/?v=4#unit-4).