Results from the first year of a 2-year study of the effects of personal consultations, provided through the internet, on teacher-child interactions in a randomly-assigned experimental group of 61 preschool classrooms in which the teachers received web-based consultation and access to videos through the MyTeachingPartner (MTP) program and a control group with access to the video materials but not to the consultations, and a comparison of the consultation's influence in classrooms of different sizes, poverty levels, and levels of student literacy