The Normal Curve Equivalent (NCE) gain statistic is examined, and considerations for its interpretation are highlighted. The NCE gain is made up of an observed and an expected part. The observed score is the posttest result. The expected score can never be observed nor verified for any of the Title I Evaluation and Reporting System (TIERS) models; it depends on a theory of growth to estimate expected performance, and each of the TIERS models assumes a different theory of growth. Therefore, NCE gains will vary according to the methodology employed. Five distinct considerations educators need to keep in mind when trying to interpret NCE gains include: (1) no matter what the NCE gain turns out to be, it could have come out differently; (2) evaluation results are valid to the extent that the achievement tests used are valid; (3) different methodologies will yield different results; (4) individual NCE gains must be treated with extreme caution; and (5) group results become more valid as the size of the group increases. (RL)