
Data Analysis
Which Excel Chart to Use? Bar vs Line vs Pie (With Examples)
Stop defaulting to pie charts. A decision framework for bar, line, pie, scatter and combo charts — with the formatting checklist markers grade.
Nov 18, 2026, 11 min read
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These guides cover the full analysis workflow — import, clean, summarise, visualise and explain. Each one is written from real student datasets and client reports, not toy examples.
6 guides · updated for 2026

Data Analysis
Stop defaulting to pie charts. A decision framework for bar, line, pie, scatter and combo charts — with the formatting checklist markers grade.
Nov 18, 2026, 11 min read

Data Analysis
Make your sheets speak: highlight top 10%, flag overdue dates, add data bars and color scales — plus formula-driven rules professors love.
Nov 7, 2026, 10 min read

Data Analysis
The 15-minute cleaning routine markers love: duplicates, trim, text-to-columns, date fixes, and a Power Query refreshable pipeline.
Oct 24, 2026, 9 min read

Data Analysis
Internal analysis of 500+ solved student workbooks reveals the 7 error patterns behind most lost marks — version mismatches, hardcodes and broken lookups lead.
Sep 19, 2026, 9 min read

Data Analysis
Build your first PivotTable in 10 minutes: rows, values, slicers, calculated fields, and the 5 layouts professors expect — with a sales case study.
Sep 18, 2026, 13 min read

Data Analysis
Stop cleaning data by hand. Learn the 10-step Power Query routine that fixes dates, splits columns, unpivots months, and merges sheets — with zero formulas.
May 30, 2026, 12 min read
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