Get early access

Blog

Notes on learning maths by hand.

Guides to the mistakes that cost the most, and notes from building Roughwork.

All Guides Building Roughwork Product notes

5 − (−3) = 2

Guide · Featured How to stop making sign errors on GMAT and GRE quantA sign error is a dropped or flipped negative. Two habits catch most of them: write the sign before the number, and plug your answer back in. David Baum · 14 September 2026 · 9 min read

Guide How to keep an error log for GMAT and GRE quant One row per miss: the question, the concept, the exact wrong step, a one sentence takeaway, and a redo date. Two worked entries you can copy. 26 October 2026 · 9 min read Guide How to stop losing GMAT and GRE points to careless mistakes Make your work visible, check every step against a fixed routine, and keep an error log. The specific check for each kind of slip. 8 September 2026 · 12 min read

New posts by email.

A short note when something new is up. Nothing else.