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Write the reference before opening the notes
Choose a formula and write it from memory, then define each symbol. Compare it with a checked reference. The learning-techniques review by Dunlosky and colleagues supports practice testing and distributed practice broadly; the finance-specific worksheet here is an original implementation, not a tested exam-pass intervention.
Attach the conditions that change its use
| Formula | Condition or unit to recall | Boundary check |
|---|---|---|
| NPV | Rate and cash-flow interval match; first value is time zero | At zero rate, add the signed cash flows |
| Modified duration | Yield-change convention matches the measure | A positive yield change gives a negative first-order change |
| Conditional probability | Conditioning probability is positive | The joint probability does not exceed the condition |
Apply the corrected reference to a fresh task
If the formula was correct but its conditions were missing, choose a question where that condition matters. A basis-point error needs a rate-unit check, while a conditional-probability error needs the correct denominator.
Schedule another attempt
Record the next recall date and the specific prompt. Use the result to decide whether the item needs another correction or a later check. Avoid marking a formula learned solely because its printed version looks familiar.