Online lectures · Science, Technology, Engineering, Mathematics, Economy, Business and Finance

Complex ideas, explained simply.

Cinematic video lectures that take you from first principles to deep understanding

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Course catalogue

Lectures built from first principles

Every course starts where you are and builds the full picture, one honest step at a time.

MATH-111

Calculus: The Mathematics of Change

Anything that changes can be describe by calculus.

16 lectures6h 20m

MATH-109

Statistics: Study of Data

Collecting, Organizing, Analyzing and Interpreting Data .

14 lectures5h 40m

PHY-101

Physics

Kinematics, Laws of Motion, Work & Energy, Power, Momentum, Inertia, Elasticity and Fluids.

18 lectures7h 10m

CHM-101

Chemistry

Atoms, Elements, Moleculus, & Ions; Periodic Table; Chemical Bonding;Stoichiometry; Gases; Thermochemistry & Energy Changes; Solutions; Acids and Bases.

15 lectures5h 55m

MATH-108

Geometry: Study of Shapes

Plane Geometry;Polygons;Solid Mensuration

12 lectures4h 45m

ECON-101

Economy: Study of choice under condition of scarcity

Fundamental Concepts in Economy

13 lectures5h 05m

FIN-101

Finance: Study of Money

Fundamental Concepts in Finance

13 lectures5h 05m

BUS-101

Business: Providing solutions to a problem

Fundamental Concepts in Business

13 lectures5h 05m

The method

Simple is not shallow

Step 01

Start from intuition

Every lecture opens with something you already understand — a kettle, a bridge, a battery — and builds the formal idea on top of it.

Step 02

Derive, don't declare

Equations are earned on screen, step by step, so you see where each term comes from and what it physically means.

Step 03

Return to the real world

Each concept closes with a real engineering case — from lab experiments to industrial systems — so the idea stays with you.

The instructors

Taught by working researchers

These lectures are built by people who spend their days at the bench — running experiments, analyzing data, and writing papers — and who believe the gap between research and the public is a translation problem, not an intelligence problem.

"If you can't explain it simply, you haven't finished understanding it yourself."

Founder of Claritas Academy

Januario Ribeiro da Costa, PhD

Science · Mathematics · Engineering

Short description of this instructor's background and expertise — what they research, what they teach, and why students can trust them.

Lead instructor

Instructor Name

Statistics · Data Science

Short description of this instructor's background and expertise — what they research, what they teach, and why students can trust them.

Founding membership · one plan, every course

Understand the world the way engineers do.

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