What makes a book similar enough to recommend?
Define two book features and a reader need. Find a recommendation that is close but unsuitable.
Rank books by weighted squared distance, with an optional accessibility requirement before ranking.
Cut these cards apart. Use the original example first, then let a partner supply a changed case. Keep sealed/final cards with the teacher until the learner commits a rule.
Book: Reef tales
Length: 3
Difficulty: 2
Accessible format: True
My prediction and reason:
Book: Bird atlas
Length: 8
Difficulty: 5
Accessible format: False
My prediction and reason:
Book: Bush poems
Length: 2
Difficulty: 4
Accessible format: True
My prediction and reason:
Book: Long voyage
Length: 9
Difficulty: 8
Accessible format: True
My prediction and reason:
Distance represents the chosen features, not every reader need or book quality.