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Engineering degrees are worthless if the reasoning isn't yours.
Engineering is a first-principles discipline. AI shortcuts hide skill gaps that will surface in your first real project — or your first real interview. Brainback trains the reasoning, defends the calculation, and keeps you honest about your assumptions.
Derive one formula in Learn mode from scratch on day one. Feel how much slower it is than pattern-matching. That's the intuition you're paying for.
An honest before-and-after — the specific gaps Brainback closes for a student in this stage of the arc.
Same problem. Same student. Two different definitions of “productive.”
The actual daily shape of a Brainback week for this stage. Adjust for your own load — the rhythm compounds even if the volume varies.
15 cards AM. One Learn session on the hardest PSet due Thursday.
Same. Explain-back on today's most confusing concept.
Recall pass. One LeetCode in Learn mode.
PSet due. Explain-back on the trickiest problem post-submission.
10 cards. Lab writeup in Efficiency. Free evening.
Optional deeper Learn session on shaky material. LeetCode if interview-prepping.
Brain score. 15 cards. Plan the week.
None of these are automatic. Each is a signal that the product is working — or isn’t. If you don’t hit the week-4 milestone, revisit the plan.
First 'oh — the formula came from THIS' moment mid-derivation.
Brain score in the 60s. Interview intuitions starting to build.
Grade closely tracks Brain score in that subject.
Whiteboard rounds feel familiar because you've been narrating derivations for months.
Trend line matters more than any single week. Watch the compounding, not the daily.
Not a magic diet. A specific sequence of habits Brainback builds around you. The pace is designed for a student with a normal life outside coursework.
Add courses as Learn subjects. Attach labs and PSet templates as materials. Add LeetCode as its own Learn subject if you're interview-prepping.
Every PSet: Learn mode on the hardest half. Efficiency for the routine calculations. Recall queue starts on formulas + physical intuitions.
Explain-back on every unclear concept the day it appears in class. Brain score becomes meaningful.
Interview prep for spring / summer recruiting. LeetCode in Learn mode. Recall queue picks up complexity intuitions.
Two weeks. Recall passes twice daily. Deep Learn sessions on the two hardest courses.
Whiteboard rounds feel like a Learn session. Because they are one — you've been doing them daily for months.
All seven product surfaces are always on. But this stage of the arc weights them differently. Below are the ones a engineering student ends up leaning on hardest.
Every derivation, every PSet, every LeetCode.
The one thing that catches 'I coded it' vs. 'I can defend the complexity'.
Formulas + physical intuitions retrieved on schedule.
Lab writeups, scratch scripts, résumé. Anything not graded on reasoning.
Recall, calibration and explain-back per course — the derivations you can produce, not the ones you recognise.
Add these as Learn subjects and Brainback treats every problem inside them as academic — everything else goes to Efficiency mode. Every subject below has its own dedicated page with topics, common mistakes, and hint examples.
Limits, rates, and shapes of change — earned, not delivered.
Vectors are directions, not numbers.
Draw the free-body diagram. Actually draw it.
Forces, motion, and the shape of physical reasoning.
Reason about the algorithm before you type it.
State the recurrence. Solve it later.
Recommended plan: Student — $9.99/mo (or annual $59/yr). Full engineering load. Annual saves the equivalent of two semesters. See all plans →
We say no to some prospects. Better to be honest here than to have you sign up and churn in week two.
I finally understood control theory instead of just passing the problem set.
Yes for the interview prep phase; less so for the internship itself (which is real work, not simulated coursework). But the reasoning habit transfers — the intern who can defend their assumptions gets to keep making them.
Learn mode covers the concepts; the tool-specific fluency comes from doing the assignments. Brainback isn't a MATLAB tutorial — it's the reasoning around what you're writing.
Yes. Grad courses reward first-principles reasoning even more than undergrad. Same workflow, deeper problems.
Full 4–5 course semester + interview prep saturates the free tier by Wednesday. Student is right for a normal engineering load.
Yes — the tutor handles LaTeX natively and renders math correctly. Efficiency mode drafts LaTeX for reports and lab writeups.
The lines between stages are messy. If more of the day-in-the-life above sounds like someone else, follow the link.
→for engineering
Student annual ($59/yr) — the full undergrad + interview arc.