A synthesis of four studies regarding math facts:

Math Fluency Is Etiologically Distinct From Untimed Math

Performance, Decoding Fluency, and Untimed Reading

Performance: Evidence From a Twin Study;

The Co-Development of Skill at and Preference for Use of

Retrieval-Based Processes for Solving Addition Problems:

Individual and Sex Differences from First to Sixth Grade;

Cognitive Predictors of Achievement Growth in Mathematics: A Five Year Longitudinal Study;

Competence with Fractions Predicts Gains in Mathematics

Achievement