The "Clinical Evaluation of Language Fundamentals-Fifth Edition" (CELF-5; Wiig, Semel, & Secord, 2013) is a recently updated battery of tests designed to assess, diagnose, and measure changes in language and communication in individuals 5 to 21 years of age. Designed to identify language strengths and weaknesses, determine service eligibility, provide intervention strategies, and measure intervention efficacy, the CELF-5 assesses both oral and written language as well as non-verbal communication skills. As a Level B measure, the CELF-5 can be administered by speech and language pathologists, school psychologists, special educators, and qualified diagnosticians with a master's degree or certification in standardized testing. The core tests can be completed within 30 to 45 min, whereas the full battery may take 90 to 120 min. The measure includes an Examiner's Manual, Technical Manual, two Stimulus Books, 25 copies of Record Forms 1 and 2, 10 copies of Reading and Writing Supplements 1 and 2, 50 Observational Rating Scales, and 30 Q-global Score Reports. The Examiner's Manual outlines the recommended assessment process and provides instructions for administration, scoring, and interpretation of subtests as well as suggestions for intervention and further assessment. The Technical Manual provides details of the purpose, design, development, standardization, and psychometric properties of each subtest. The CELF-5 can be used within educational, clinical, and research settings and is standardized on a large and representative population. The CELF-5 has revised content and scope, improved administration and scoring procedures, and new processes for evaluating written language and pragmatics. In addition, the new assessment process allows for flexible and efficient use of individual and groups of subtests. Since the development of the CELF-4, it is clear that the test developers have made significant improvements in user-friendliness, content, and flexibility of the measure, which largely outweigh the minor limitations. Overall, the CELF-5 is a useful and dynamic tool for assessing language weaknesses and strengths.