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5 capsules

A Manager's Guide to Performance Improvement Plans: Goals, Data, and Wellbeing
For the employee on one, a performance improvement plan either means the company is invested in their turnaround or quietly building a case to fire them. The approaches here differ on whether plans should be developmental or measured strictly by data, how goals should be framed to reduce conflict, and how much wellbeing and psychological safety drive real improvement. How you run one decides which message your team hears.

Grade Retention Alternatives: Literacy Support, Tutoring, and Progress Monitoring
Repeating a grade feels like a second chance, but the evidence says it often makes things worse. These interventions offer what works instead: early literacy help, tutoring, and progress monitoring that catches struggles before retention is on the table. They differ on timing and method, and together they explain why strict hold-back policies backfire.

Actionable Metrics: Better Decisions Beyond Vanity Numbers
Vanity metrics can make performance look stronger while obscuring whether the business is actually improving. Learn how to choose metrics that test hypotheses, inform strategy, and reveal customer behavior through cohort analysis and attribution. Understand why turning a measure into a target can distort its meaning and lead teams away from better decisions.

Interval Training's Fat Loss Edge: Missing Data and Cardio Evidence
The cardio-versus-intervals argument drags on partly because fat loss studies are riddled with dropouts and missing measurements. This take argues that when those gaps are filled with rigorous statistical methods instead of ignored, high intensity interval training pulls clearly ahead of steady state cardio. If you care what the evidence really says, the way researchers handle incomplete data should change which workout you trust.

Growth Mindset in Schools: Evidence, Limits, and Real-World Impact
Telling students that effort beats talent became a classroom staple, but the results are contested. These views split between evidence that mindset programs genuinely lift grades and course choices and critiques pointing to weak studies, publication bias, and thin real-world impact. You can decide how much faith to put in mindset teaching.