This guide outlines in chart form the speech, hearing, and language behaviors which may be expected from children of ages 3 months through 5 years. It is designed to indicate progress and to alert parents and professional personnel to deviations from normal development. The information, in question-answer form, sketches behaviors for nine age groups: 3-6 months, 7-10 months, 11-15 months, 1 and a half years, 2 years, 2 and a half years, 3 years, 4 years, and 5 years. (JM)