Payal Tandon
Co-founder, e-GMAT
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Introducing PRiSM Learning: Everything We Learned Building e-GMAT, Rebuilt for the Digital SAT

Introducing PRiSM Learning: Everything We Learned Building e-GMAT, Rebuilt for the Digital SAT
A 6 min read
PRiSM Learning A new venture from e-GMAT

Fifteen years ago, we started e-GMAT with a conviction that felt almost naive at the time: that a course could know its student — what they’ve mastered, where they’re stuck, and precisely what to do next. You, our students and alumni, turned that conviction into thousands of success stories. Along the way we built PACE, Scholaranium, and a mastery-based way of learning that many of you now describe to friends as simply “the e-GMAT way.”

Today we get to share something we’ve quietly been building for over a year: PRiSM Learning — an AI-powered prep platform for the Digital SAT, created by the two of us, Payal Tandon and Rajat Sadana. It is the e-GMAT methodology, rebuilt from scratch for a new exam and a new generation — quite literally, because our first student was our own daughter.

PRiSM's personalized course page
The PRiSM course page — assembled for each student by PACE, and reshaped every time a milestone is completed.

It started at our dinner table

When our daughter Palak began preparing for the SAT, we did what any parents in our position would do: we looked at every prep option out there. Nothing measured up to what we knew was possible. So we built her a course ourselves — the same first-principles instruction, adaptive sequencing, and relentless measurement we’d spent fifteen years refining for the GMAT, re-engineered for the Digital SAT.

Palak scored a 1560 and is now at Johns Hopkins. That course, matured and expanded, became PRiSM — Personalized, Responsive, Impactful, Smart Methodology. The full story is on our About Us page.

Palak, PRiSM's first student
Palak — the student PRiSM was built for. 1560 on the SAT, now at Johns Hopkins.

The same learning loop you know — sharpened

If you’ve studied with us, the architecture will feel familiar: diagnose first, learn from first principles, then cement until mastery is proven. On PRiSM, that loop runs end to end from day one.

The PACE, LEARN, CEMENT learning loop
PACE → LEARN → CEMENT: the loop that powered e-GMAT, now driving every PRiSM course.

PACE is enabled for both coursesSAT Math and SAT Reading & Writing. A 25-minute adaptive diagnostic maps what a student already knows; PACE then skips the mastered material outright and builds a course around what actually needs work. Across a typical prep timeline, that’s 100+ hours a student never has to spend relearning things they already know.

Course page with PACE enabled showing hours saved and skipped modules
PACE in action on a live course: modules skipped, 19 hours already saved, and the path ahead recalculated.

Mocks at a scale we’ve never offered before

We have always believed practice tests should be diagnostic instruments, not just scoreboards. PRiSM ships with 15 full-length adaptive practice tests — scored within ±20 points of the real Digital SAT — plus 80 sectional mocks for pressure-testing Math or Reading & Writing one module at a time.

Score trajectory from 1260 to 1560 across full-length tests
Fifteen full-length tests give a real trajectory — here, 1260 to 1560 over a full prep cycle.

The test engine reproduces Bluebook with obsessive fidelity: module-adaptive routing, the built-in Desmos calculator, highlighting and annotation, answer cross-out, and timed breaks. Nothing about the real exam should feel new on test day. See the full mock experience here.

Bluebook-style test engine with built-in Desmos calculator
Our test engine mirrors Bluebook — down to Desmos, annotation, and cross-out.

Analytics beyond Scholaranium

Scholaranium taught us that data changes behavior only when it explains the why. PRiSM pushes that idea further than we ever have: every single miss is diagnosed across four behaviors — Ability, Speed, Judgment, and Careless — because a concept gap, a timing collapse, a trap answer, and a silly slip each demand a different fix.

Four-way diagnosis: Ability, Speed, Judgment, Careless
One wrong answer, four possible causes — PRiSM tells you which one it was.

A five-step analytics loop then turns those diagnoses into action: pinpoint weaknesses, build a roadmap, practice strategically, track accuracy in real time, and verify the improvement before test day. Every question comes with a per-question behavior review and a walkthrough solution.

Walkthrough solution for a practice question
Walkthrough solutions model the expert thought process, step by step.

Here’s the kind of story this data tells. One of our students watched his hard-question accuracy rise from 81% to 90% over successive attempt windows — while his average time per question dropped from 1:29 to 50 seconds. When speed and accuracy improve together, that’s not luck; that’s cemented mastery, and the dashboard proves it.

Time and accuracy progression: accuracy 81% to 90% while average time drops from 1m29s to 50s
Speed and accuracy climbing together on hard questions — 81% → 90% while time per question fell from 1:29 to 0:50.

The same dashboards also catch what students can’t see themselves. This student’s practice accuracy averaged 91% — but under mock conditions it fell to 67%. PRiSM flags that 24-point pressure gap explicitly and shows the underlying pattern (27% of his attempts were correct but slow). The fix isn’t another lesson; it’s timed, test-condition practice. That’s the difference between analytics that report and analytics that coach.

Error breakdown and practice-vs-mock accuracy comparison showing a 24-point gap
The “What’s causing it?” view: error types on the left, and on the right the flag that matters — 24 points lower under mock pressure.

Cementing, with thresholds that mean something

Our alumni know we never let “I watched the lesson” pass for mastery. On PRiSM, cementing uses rolling-average mastery: students clear a Standard track at 80% accuracy, then a Hard track at 70% on the toughest questions in the bank. Only then does a skill count as done.

Standard 80% and Hard 70% cementing quiz tracks
Two cementing tracks: 80% on Standard, then 70% on the hardest questions.

A brand-new platform — not e-GMAT reskinned

PRiSM runs on an entirely new platform we designed to be self-paced and self-explanatory — a teenager should be able to drive it without a manual, and parents should be able to read it at a glance. As students complete milestones, the platform adapts around them: next steps, revision priorities, and projected finish dates all update automatically. The student always stays in control.

The content behind it: 1,000+ concept lessons, 14,000+ practice questions — roughly 10× the official Bluebook bank — and a custom quiz builder spanning 200+ skill topics. Explore the platform in detail here.

And because we hold ourselves to outcomes, PRiSM carries a score guarantee of up to +160 points, with no cap below 1600.

Try everything — free for 7 days

We want every family in the e-GMAT community to see this for themselves, so we made the trial radical: the entire course is free for 7 days — every lesson, every mock, every analytic. No credit card required. Take the PACE diagnostic, sit a full-length adaptive test, and read your own four-way diagnosis before spending a rupee or a dollar.

Start the free 7-day trial →

When you’re ready to continue, there are two simple plans — one of which includes 20 one-to-one mentoring sessions with our team. For SAT strategy content in the meantime, we’re publishing regularly on the PRiSM blog.

Fifteen years of e-GMAT, distilled into a new beginning. We’d love for your family to be part of it.

Payal Tandon, Co-Founder of e-GMAT and PRiSM Learning
Payal Tandon, Co-Founder
Rajat Sadana, Co-Founder of e-GMAT and PRiSM Learning
Rajat Sadana, Co-Founder

About The Author


Rajat Sadana, CEO and co-founder of e-GMAT, is the #2-ranked GMAT expert globally on GMAT Club and a 99th percentile GMAT scorer who has transformed how students approach the GMAT through revolutionary teaching methods that have produced more verified 700+ scores than any other prep company globally.  Under his leadership since 2010, e-GMAT has helped over 50,000 students secure admissions and $200+ million in scholarships, with students achieving a remarkable 55% of all 700+ scores reported on GMAT Club in 2021.  Armed with a Master of Technology from IIT Delhi and an MBA from Babson College, Rajat brings unique technical expertise, holding five patents from his engineering background at companies like Honeywell, where he grew a wireless business from $2M to $25M.   His GMAT specialization centers on innovative teaching methodologies he personally developed, including the revolutionary "pre-thinking" approach for Critical Reasoning that systematically trains students to analyze arguments and anticipate assumptions before examining answer choices.   Driven by a mission to "democratize test prep education by leveraging technology," Rajat left his corporate career to create what he calls "a private tutor experience at the price of a book," combining his technologist mindset with data-driven personalization that emphasizes active learning through immediate feedback and systematic mistake analysis.  His methodology has consistently produced hundreds of successes in the 99th percentile range, including a perfect 805 score achievement and dramatic improvements like students jumping 110 points in just 20-25 days, with e-GMAT delivering "10× more" scores of 700+ than average prep companies.  Having delivered over 5,000 hours of live instruction, Rajat frequently mentors students personally, often analyzing individual performance and creating tailored study plans. He actively contributes to the GMAT community through his e-GMAT blog articles, live webinars, and appearances on platforms like the MBA Admissions Podcast, sharing strategies that have democratized access to elite GMAT preparation globally.