Hollow Institute
Anyone who works with reports or dashboards.

Foundations of Data Literacy

Read, question and reason with data — no maths degree required.

Take the first lesson

Plain-language lessons

Every concept explained with everyday examples.

Hands-on exercises

Short tasks after each unit so the ideas stick.

Self-paced

Work through modules whenever it suits your week.

Ready when you are

A practical, self-paced course that turns spreadsheets and charts from intimidating to obvious. Learn to spot misleading graphs, summarise numbers clearly and make decisions you can defend. Guided by Oliver Grant, a practitioner who keeps theory tied to real work.

Take the first lesson