Table 2 Patterns of misunderstandings and methods of changing materials (assume H2SO4 appears in the original problem)
From: Practice supporting system with related problem set generator based on targeted educational effects
Target of learning | Pattern of misunderstanding | Example | Changing materials |
|---|---|---|---|
Applying conditions (e.g., x ∈ acid) | Applying conditions understood by learners who are narrower than the correct one. | If x ∈ H2SO4 | H2SO4 → HCl |
Applying conditions understood by learners who are broader than the correct one. | If x ∈ electrolyte | H2SO4 → NaCl | |
Hierarchy of material classes | In learners’ understanding, a material belongs to a class, although, it does not in fact, belong. | NaCl ∈ acid | H2SO4 → NaCl |
In learners’ understanding, a material does not belong to a class, although it does, in fact, belong. | HCl ∉ acid | H2SO4 → HCl |