Thank You!

Mastery-Based Math Education

Mathematics
Without Barriers

∑(knowledge) = ∫(practice · accuracy) dt → mastery

The best way to learn math is throught practice. TXTBK eliminates the two biggest barriers to STEM success in Africa: language and reliable content access. Built on pre-calculated problems — not AI — every problem is 100% accurate, works offline, and speaks the student's mother tongue.

100% Offline
Zero Hallucinations
Local Languages
Zero Cost
Open the Library → Support the Mission
300+
Core Modules
3M+
Unique Problems
10K
Variations / Topic
100%
Math Accuracy
0
Internet Required

Engineered for the Field,
Built for Mastery

Unlike textbooks or AI tutors, TXTBK uses pre-calculated logic to create an inexhaustible learning environment built specifically for sub-Saharan Africa's infrastructure.

Infinite Practice

Each problem type generates unlimited unique examples. A student never sees the same calculation twice until mastery — across 300+ modules from primary arithmetic to university-level matrix algebra.

Zero Hallucinations

By avoiding Generative AI entirely, TXTBK guarantees 100% mathematical accuracy. Deterministic code follows immutable rules — even a 1% error rate is a major pedagogical failure.

100% Offline

A lightweight application for e-readers, tablets, and smartphones. Once loaded via USB or local hotspot, it requires zero cellular data. Install-and-forget for unstable connectivity areas.

Mother Tongues First

Neuroscience shows abstract concepts are best learned in a child's mother tongue. TXTBK localizes into national languages so students focus purely on mathematical logic.

Hardware Agnostic

Optimized for devices in the field: low-cost smartphones, tablets, and E-ink readers. Our partners distribute this hardware and TXTBK clothes them with inexhaustible content.

Near-Zero Marginal Cost

Paper wears out and costs money to ship. TXTBK is permanent digital infrastructure, offered free of charge to NGO, school and government partners.


How We Compare

A direct comparison against paper textbooks and Generative AI tutors.

FeatureTXTBKPaper TextbooksGenerative AI
Internet AccessNot Required — 100% Offline Not Required Required
Math Accuracy100% Deterministic Logic High but Static Hallucination Risk
Exercise VolumeInfinite — Dynamic Very Limited Infinite
Distribution CostNear-Zero — Digital Very High High — API Costs
National LanguagesYes — Field Optimized Rarely Limited
HardwareMobiles, E-readers, Tablets Physical Only Modern Devices Only
Step-by-Step SolutionsEvery Problem, Guaranteed Some Only Inconsistent


Everything You Need to Know


Built from Lived Experience

KSN
Kasole Sangwa Nyembo
Founder · Economist · CFA Charterholder

Current Economist at Housing, Infrastructure and Communities Canada, specializing in AI and Automation. Former Economist at Global Affairs Canada. Master's in Economics and CFA Charterholder. Author of EconBook — an illustrated poetry book on economics. Built TXTBK to bring world-class math to every classroom on Earth.

AI Policy · Government of Canada M.Sc. Economics CFA Charterholder Author · EconBook Native of Kinshasa, DRC