Electromagnetic Induction Rediscovered Using Original Texts

Some of Faraday's diary-entries from 1831 have been used frequently as starting point to introduce the phenomenon of electromagnetic induction. This has been done on various levels of knowledge and to pupils of different ages during the last 5 years. I try to let my pupils witness, how Faraday made his discovery, but to show as well, that we cannot infer from his notes, how he arrived at his ideas proper. Reading the original notes (in English), my pupils were expected to take out of it, what Faraday did at his lab, what apparatus he used and what his observations were. Why he did what he did was point of discussion later on. Just here, I expected, that my pupils learn a lot about the properties of electricity, of taking conclusions from experiment, of scientific methodology etc. In addition, we repeated some of Faradays experiments with modern quipment, realizing always to common surprise that the effects observed are extremely faint ones. Depending on knowledge, age and motivation of the group, Lenz's Law was rediscovered in succession. Here I myself try to find out, why Faradays initial mistake as for the direction of the induced current is likely to be overlooked even by the informed modern reader (myself included!). This may become part of a story, why this mistake of Faraday has found serious attention by historians of science only very recently. My approach was connected with group work with English courses, with the reading of more papers by Faraday and two times even with a visit of the Royal Institution at London. In any case, I always tried to put my pupils into the state of knowledge Faraday had at the time of his discovery before this unit, to make the process of discovery as correct as possible. For this claim is somewhat artificial at first glance, it may be an interesting point of discussion.     

Outpatient mental health services for children in foster care: a national perspective

OBJECTIVE: To determine factors influencing the use of outpatient mental health services provided by mental health professionals (OMHS) for children in foster care using a national probability sample in the United States. METHOD: As part of the National Survey of Child and Adolescent Well-being, detailed survey data were collected on 462 children, ages 2-15, who had been in out-of-home care for approximately 12 months at the time of sampling. A multivariate logistic regression model was used to determine how clinical need, as measured by a Total Problem, Externalizing, or Internalizing Scale T-score of 64 or greater on the Achenbach Child Behavior Checklist (CBCL), and non-clinical factors affected OSMHS use. RESULTS: Over half of the children in the sample received at least one OMHS. Need, older age, and history of sexual abuse history all positively predicted OMHS. A history of physical neglect negatively predicted OSMHS. African-Americans used fewer services than children of Caucasian ancestry at all values on the CBCL. This finding was particularly salient at lower levels of CBCL scores; at higher levels, the discrepancy in the use of services diminished but the proportion of children receiving services remained lower for African-American children. CONCLUSIONS: This national study confirms previous findings regarding the use of mental health services based on regional data. Limitations in the use of services imposed by non-clinical factors, specifically, age, race/ethnicity and type of abuse, need to be examined in order to address implicit and explicit policies and practices that may result in inequitable distribution of services.     

An Experimental Study of Scheduling and Duration of "Tier 2" First-Grade Reading Intervention

This study compared the effects on reading outcomes of delivering supplemental, small-group intervention to first-grade students at risk for reading difficulties randomly assigned to one of three different treatment schedules: extended (4 sessions per week, 16 weeks; n = 66), concentrated (4 sessions per week, 8 weeks; n = 64), or distributed (2 sessions per week, 16 weeks; n = 62) schedules. All at-risk readers, identified through screening followed by 8 weeks of oral reading fluency (ORF) progress monitoring, received the same Tier 2 reading intervention in groups of 2 to 4 beginning in January of Grade 1. Group means were higher in word reading and ORF at the final time point relative to pretest; however, the groups did not differ significantly on any reading outcome or on rates of adequate intervention response. Of potential covariates, site, age, free lunch status, program coverage rate, and tutor were significantly related to student outcomes; however, the addition of these variables in multivariate models did not substantially change results. Rates of adequate intervention response were lower than have been reported for some first-grade interventions of longer duration.     

Classroom contextual effects of race on children's peer nominations

Black children generally receive poorer sociometric nominations compared with Whites. This effect is not fully understood because Black children rarely hold a classroom majority and teachers' race is rarely investigated. Research from a person-environment perspective suggests that the effects of children's race depend on the racial composition of the classroom and society's racial attitudes. Sociometric nominations were obtained from 1,268 5th graders, between 9 and 11 years old (53% Black), across 57 classrooms (3-95% Black students). Half of the teachers were Black. The results indicated that ratings of Black children were more influenced by the racial context of classrooms than were ratings of White children. The implications of this study are discussed in relation to group dynamics and racial discrimination.