Quantitative growth curve models for estimating individual developmental functions from various types of longitudinal data are discussed in the context of investigator assumptions and research design characteristics. Linear and nonlinear models that estimate growth curves are illustrated, and contrasted when they are fit to speech development…

Presents six suggestions for personalizing professional development for middle school teachers: (1) encourage openness to change; (2) facilitate teachers' self-assessment; (3) urge teachers to be learners; (4) encourage a focus on the enjoyable in teaching; (5) advocate that teachers contribute to peers' growth; and (6) promote full lives beyond…