Boss Fight · Week 1
Boss: Guess the Weight
No scale allowed for 10 minutes
Uncle TJ (or a family member) places 5–10 household objects in a box. You cannot weigh them for the first round.
Phases
Phase 1: Estimate
For each object: hold it, shake it if safe, estimate mass in grams or kg. Write your reasoning (size? material? compare to known object?).
Phase 2: Measure
Weigh each object. Record actual mass. Calculate your error factor (estimate ÷ actual, or the other way — pick one and stay consistent).
Phase 3: Post-mortem
Which estimate was worst? Why? What trick will you use next time?
Rubric — score yourself honestly
Reasoning quality (35%)
4: Every estimate has clear decomposition or comparison
3: Most estimates explained
2: Some guesses without reasoning
1: Numbers only
Accuracy (25%)
4: 80%+ within 2× of actual
3: 60%+ within 2×
2: Some within 2×
1: Most off by 10×+
Units & recording (20%)
4: Clean table, correct units throughout
3: Minor unit slips
2: Missing units in places
1: No structured record
Post-mortem honesty (20%)
4: Specific insight that would improve next round
3: Identifies what went wrong
2: Vague reflection
1: No reflection
Evidence checklist
Engineer's Log
Boss debrief — Boss: Guess the Weight: What worked? What failed? What would v2 be?