Assessment: The process of gathering information to monitor progress and make
educational decisions if necessary. As noted in my definition of test, an assessment may
include a test, but also includes methods such as observations, interviews, behavior
monitoring, etc.
Evaluation: Procedures used to determine whether the subject (i.e. student) meets a preset
criteria, such as qualifying for special education services. This uses assessment (remember
that an assessment may be a test) to make a determination of qualification in accordance
with a predetermined criteria.
Measurement, beyond its general definition, refers to the set of procedures and the
principles for how to use the procedures in educational tests and assessments. Some of the
basic principles of measurement in educational evaluations would be raw scores, percentile
ranks, derived scores, standard scores, etc.
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