However, texts should also not be too easy because
the optimal learning effect will only be triggered once the new learning content is slightly above the current level of proficiency of learners.
From that life altering encounter, Tracey experienced
optimal health and balance that sent her on a journey to
learn as much as she could about the
effect food and lifestyle have on the body.
Challenging behavior in the early years of development, defined as «any repeated pattern of behavior or perception of behavior that interferes with or is at risk of interfering with
optimal learning or engagement in pro-social interactions with peers and adults» (Systems of service delivery: A synthesis of evidence relevant to young children at risk of or who have challenging behavior, University of South Florida, Tampa, 2003), can have pervasive deleterious
effects on the child's social emotional functioning,
learning, and longitudinal outcomes over time (Behav Disord, 32:29 — 45, 2006; Preventing mental, emotional, and behavioral disorders among young people: Progress and possibilities.