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Power BI, data visualization & AI. Free.

Step-by-step courses, interactive exercises, a chart library, AI guides, practice files and free templates. No payment, no credit card.

Everything here is free. Your progress is saved on this device. Sign up free to keep your progress & scores in your account, on any device.

New: interactive Excel, Google Sheets, DAX & Power Query practiceType formulas straight into the worksheet and get instant checks. Hundreds of exercises, most of them free. New: talk slides “Data Storytelling: Turning Numbers into Insight”Perwira Learning Festival 2026 · Mandiri Tunas Finance · Participants only (password from the organisers): slides, speaker notes, PPT & PDF and an AI skill pack.

Learning collections

Course · 21 lessons · ~2.5 hr · Free

Power BI: Zero to Dashboard

A hands-on, step-by-step path from a blank file to a published, shareable dashboard, with a practice file and copy-ready DAX formulas. Course · 22 lessons · ~2.5 hr · Free

Data Visualization Fundamentals

Five tracks from first principles to real business cases — chart choice, colour, dashboards and storytelling. Interactive · 4 exercises · 22 min · Free

Practice Lab

Hands-on exercises with instant, specific feedback — the way a mentor would give it. Reference · 11 chart guides · 33 min · Free

The Chart Library

Every common chart type — when it shines, when it fails, and the mistakes to avoid. Guide · 6 guides · 39 min · Free

AI & Dashboard Guides

AI workflows for data analysis and dashboards with ChatGPT, Claude and Gemini, complete with copy-ready prompts. Template · 1 template · Free

Free Google Sheets templates

Ready-made Google Sheets templates. Make a copy and it’s yours, no sign-up needed.

Suggested learning order

  1. 1Learn the basicsTracks 01–02 of Data Visualization Fundamentals
  2. 2Build a dashboard in Power BI7 modules, a practice file & copy-ready DAX
  3. 3Practice with exercisesSimulator, playground, dashboard critique, story builder
  4. 4Speed up with AIData analysis & dashboards with ChatGPT, Claude, Gemini

Free practice files

Datasets to practice with in Power BI, Excel or with AI.

Power BI practice fileSales, Product and Region tables, plus July & August data for the append exercise. Used in every module of the Power BI course.Excel · ~1,200 rows · free Download Data analysis practice file (messy)9,408 rows of fictional coffee sales, complete with real-world data problems. Used in the Claude & ChatGPT analysis guides.Excel · 9,408 rows · ~400 KB · free Download
Want a result and a certificate?Follow the Data Career or Work Faster path: these lessons + a final project → a completion certificate.