CASE STUDY · EDUCATION
Edvex: eight exam tracks, one platform.
Students preparing for the SAT, GRE, MCAT, LSAT, and more were juggling a pile of disconnected apps — practice in one, flashcards in another, tutoring in a third, none of them talking to each other. Edvex replaces the pile with one platform where every feature reads from the same live picture of the student.
- Client
- Ariel Kopolovitz, Founder, Edvex
- Industry
- Education
- Live at
- getedvex.com
- Built by
- Coder Crew
8+
Exam tracks, one codebase
13
Integrated product modules
76
Application pages
67
Automated end-to-end tests
Test prep was working against the student.
Fragmented tools, zero shared memory
Practice, flashcards, tutoring, and planning lived in separate apps. The tutor never knew what was practiced yesterday.
Static, one-size-fits-all content
Fixed question banks bored strong students and buried weak ones. Nobody got material aimed at their actual gaps.
Expert feedback was gated and slow
Essay and interview feedback meant booking a human tutor: costly, scheduled, and unavailable at 11pm before a deadline.
Guardians were flying blind
A parent's only progress signal was asking the student, which rarely produced an accurate answer.
Every new exam meant a new build
Extending from SAT to GRE or MCAT usually means a separate product, a separate pipeline, and a separate cost.
Five problems, five design answers.
Before
Fragmented tools
After
One platform, one data model. Practice, tutoring, flashcards, essays, interviews, and planning all read from the same live performance history.
Before
Static content
After
An engine that recalibrates per answer. Every answer updates the student's tier, re-targets difficulty, and triggers fresh AI-generated questions.
Before
Gated feedback
After
Grading and coaching on demand. Rubric-based essay grading and an AI interview coach respond the moment work is submitted — no booking, no waiting.
Before
Guardian blindness
After
A dedicated guardian dashboard. Analytics, insights, and forecasting go straight to the parent — no student self-reporting required.
Before
Exam-by-exam builds
After
One engine, eight tracks. Shared adaptive infrastructure tuned per exam shipped SAT through Bar from a single codebase.
A learning loop that never stops recalibrating.
Most platforms serve a fixed question bank. Edvex treats every single answer as a signal — and rebuilds the student's next question around it.
Answer evaluated
Correctness, timing, and topic captured
Tier updated
Performance tier recalculated live
Difficulty reset
Next-question difficulty re-targeted
AI generates
A fresh question is written, duplicates blocked
Delivered
The student sees material tuned to right now
Answer evaluated
Correctness, timing, and topic captured
Tier updated
Performance tier recalculated live
Difficulty reset
Next-question difficulty re-targeted
AI generates
A fresh question is written, duplicates blocked
Delivered
The student sees material tuned to right now
Study packs and the review system run on the same signal: packs assemble questions at the right difficulty, and review resurfaces only what the engine has flagged as weak.
Thirteen modules, one data spine.
Every module reads and writes the same performance history — a flashcard reviewed or an essay graded sharpens the same picture the adaptive loop and guardian insights run on.
Student dashboard
Progress, sessions, and metrics in one tier-aware view
Adaptive practice
Every question tuned to the student's live tier
Exam simulation
Timed, true-to-format mock exams
Smart review
Resurfaces only flagged weak areas, not a generic re-test
AI tutor "Ed"
Voice-enabled tutoring with multi-session memory
Materials processing
PDFs and notes auto-become summaries, terms, and questions
Flashcards
Spaced repetition scheduled per card for retention
Study planner
AI schedules study phases around real availability
Essay grading
Rubric-based scoring with concrete feedback over time
Interview practice
Behavioral and technical modes with personas and debriefs
Community
Forums, study groups, and shared study packs
Guardian dashboard
Analytics, forecasting, and secure messaging for parents
Admin control center
Subscriptions, AI quality review, moderation, system health
What shipped.
A stack of separate tools replaced by one cross-linked product
Static question banks became continuous per-answer recalibration
Guardians see real progress without student self-reporting
Eight-plus exam tracks shipped from a single codebase
Sixty-seven automated end-to-end tests validated every track before launch
How it's built.
| Frontend | React 18 · Vite · Tailwind CSS · Radix UI · Framer Motion |
| Backend | Supabase: PostgreSQL, Auth, Storage, Realtime |
| AI | OpenAI GPT-4o and GPT-4o-mini · Whisper · text-to-speech |
| Serverless | 35 Supabase Edge Functions (Deno); keys never touch the client |
| Payments | Stripe Checkout, subscriptions, webhooks, 7 plans |
| Security | Row-level security across 20+ entities: student, guardian, and admin isolation |
| Testing | Playwright: 67 automated end-to-end tests across all exam tracks |
Why Coder Crew.
One accountable team delivered the architecture, the AI integration, the security model, and the test suite — not a loose assembly of contractors.
Have a build that needs shipping — or a business still running by hand?
Either way, we start the same place: understand first, then build. The audit is one week, one fixed price, credited toward the work.