The report finds that the body can compensate for iodide deficiency, and that iodide uptake would likely have to be reduced by at least 75% for months or longer for adverse health effects, such as hypothryroidism, to occur. The report recommends using clinical studies of iodide uptake in humans as the basis for determining a reference dose rather than using studies of adverse health effects in rats that serve as EPAâ€™s basis. The report suggests that daily ingestion of 0.0007 milligrams of perchlorate per kilograms of body weightâ€"an amount more than 20 times the reference dose proposed by EPAâ€"should not threaten the health of even the most sensitive populations.
The committee identifies teachers, or classroom practitioners, as the key to change, while acknowledging that change at the classroom level is significantly impacted by overarching public policies. How People Learn: Bridging Research and Practice highlights three key findings about how students gain and retain knowledge and discusses the implications of these findings for teaching and teacher preparation. The highlighted principles of learning are applicable to teacher education and professional development programs as well as to K-12 education. The research-based messages found in this book are clear and directly relevant to classroom practice. It is a useful guide for teachers, administrators, researchers, curriculum specialists, and educational policy makers.