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Framed by a sociocultural understanding of literacy acquisition and learning, this research study investigates methods content area teachers can use to meet the needs of adolescent English language learners and native English speakers who struggle to read texts in school. The interventions were designed to both expand students’ concepts of literacy and of themselves as literate people, and to capitalized on students’ multiliteracies by using visual art to teach students how to notice main ideas in nonfiction texts. Statistical analyses indicate that English language learners made significant gains in reading comprehension. However, analyses of students’ written reflections and of stimulated recall interviews illustrate that, although students practiced literacies in diverse and powerful ways outside of school, they maintained generally low self-concepts and highly schoolish conceptions of literacy. / Teaching & Learning

Chen, Donoho a Saunders (1998) studují problematiku hledání řídké reprezentace vektorů (signálů) s použitím speciálních přeurčených systémů vektorů vyplňujících prostor signálu. Takovéto systémy (někdy jsou také nazývány frejmy) jsou typicky vytvořeny buď rozšířením existující báze, nebo sloučením různých bazí. Narozdíl od vektorů, které tvoří konečně rozměrné prostory, může být problém formulován i obecněji v rámci nekonečně rozměrných separabilních Hilbertových prostorů (Veselý, 2002b; Christensen, 2003). Tento funkcionální přístup nám umožňuje nacházet v těchto prostorech přesnější reprezentace objektů, které, na rozdíl od vektorů, nejsou diskrétní. V této disertační práci se zabývám hledáním řídkých representací v přeurčených modelech časových řad náhodných veličin s konečnými druhými momenty. Numerická studie zachycuje výhody a omezení tohoto přístupu aplikovaného na zobecněné lineární modely a na vícerozměrné ARMA modely. Analýzou mnoha numerických simulací i modelů reálných procesů můžeme říci, že tyto metody spolehlivě identifikují parametry blízké nule, a tak nám umožňují redukovat původně špatně podmíněný přeparametrizovaný model. Tímto významně redukují počet odhadovaných parametrů. V konečném důsledku se tak nemusíme starat o řády modelů, jejichž zjišťování je většinou předběžným krokem standardních technik. Pro kratší časové řady (100 a méně vzorků) řídké odhady dávají lepší predikce v porovnání s těmi, které jsou založené na standardních metodách (např. maximální věrohodnosti v MATLABu - MATLAB System Identification Toolbox (IDENT)). Pro delší časové řady (500 a více) obě techniky dávají v podstatě stejně přesné predikce. Na druhou stranu řešení těchto problémů je náročnější, a to i časově, nicméně výpočetní doba je stále přijatelná.

Doctor of Philosophy / Curriculum and Instruction Programs / Margaret G. Shroyer / This qualitative case study focused on 11 non-traditional, ELL, Latinas within a community-based, teacher education program. The purpose of the study was: (a) to explore the various internal characteristics and external factors that foster Latina, English language learner (ELL), non-traditional students’ resiliency in reaching and remaining in college and (b) to determine what ways these internal characteristics and external factors influenced participants’ desire to pursue and ability to persist in teacher education. The researcher utilized two primary sources of data, (1) an autobiographical, qualitative survey, and (2) individual in-depth, semi-structured interviews. As a secondary source, the researcher used academic documents to provide context for student success in the program. The internal characteristic of sense of purpose and a future (demonstrated in participants’ determination, identity, and responsibility) proved to be most protective for participants’ resiliency. Caring relationships (with the features of: consejos (advice or homilies), quality not quantity, and high expectations in the context of care) proved to be the most significant external factor for fostering participant resiliency. The study also identified the overarching emergent theme of advocacy inspired by hardship found among participant discourse. Within this theme, findings indicated that, as a result of their cultural and experiential understandings, participants were able to enact culturally responsive teaching with their Latino/a students. Furthermore, participants demonstrated a strong sense of agency to improve the education outcomes of culturally and linguistically diverse (CLD) students and a desire to advocate specifically on behalf of ELL Latino/as students.

In adult education, studies have been done in the areas of persistence, self-efficacy, self-regulated learning strategies and the Hispanic population. However, this study was unique in its attempt at examining the link between the self-efficacy and self-regulated learning strategies in the persistence of Hispanic college English language learners. The purpose of this phenomenological study was to understand the experience of 1st generation Hispanic English Language learners during their first year at a Hispanic-Serving Institution. The researcher conducted 14 semi-structured interviews of their experiences both as immigrants learning the English language and first-generation college students by utilizing a phenomenological framework. The study served two purposes: (a) informing the literature and (b) supporting the necessity for helping facilitate the path to higher education for first-generation Hispanic college students. Six themes emerged from the data related to persistence among the participants: (a) unwavering support from families and teachers, (b) role models matter, (c) struggles in the pursuit of the seemingly elusive American Dream, (d) difficulties in navigating the higher education system as first-generation college students, (e) friendships and the role they play in the participants’ lives, and finally, (f) uncertainty of the future and participants’ expectations after graduation. Theoretical, empirical, and practical implications related to persistence among 1st year Hispanic students are explored. In particular, these findings highlight the need for future research that informs existing theoretical models of student persistence and the practical utility of attending to learners’ needs early in the collegiate experience.

Research has shown that late-arriving teen English language learners (ELLs) are deeply rooted in the sociocultural and educational system of their home country for a majority of their schooling time (Duff, 2001; Minichello, 2001). In their transition to a new society in North America, this group encounters sociocultural and linguistic differences in their daily lives. Through a lens entitled Critical Multiple Social Spaces, which combines the Multiple Worlds Model (Phelan et al., 1991), the concept of Third Space (Bhabha, 1994) and a sociocultural perspective on language use (Fairclough, 2001; Pennycook, 2010), this qualitative case study focuses on 10 Chinese ELL adolescents who came to Canada after the age of 15, and examines their cross-trajectory experiences of English practice in their daily lives and their language identities. At the time of this study, they were at the stage of completing high school and applying for admission to higher education institutions. Findings showed that this group’s language use in daily life is full of conflicts, negotiation and consolidation, not only at school as a usual space of contested language practice, but also at home, with peers and in other spaces. At school, social division existed both in and out of class, yet such social division was not merely due to ELLs’ reluctance to integrate. Participants positioned themselves differently in English Literature courses and core classes in accordance with their perceived proficiency. Home, generally regarded as a traditionally stable space of language practice, became another site of complex dynamics. Peer networks also emerged as embodying similar complications. In addition to racial and ethnic factors, age on arrival and length of residence played a significant role in social interaction, impacting both same-ethnic and cross-ethnic peer networks. Based on these findings, four categories are identified pertaining to participants’ cross-trajectory language experiences, in which English spaces are positioned differently in relation to other spaces. Equally noteworthy are the dynamics between social spaces, social relations and language use, which shape – and are shaped by – symbolic power, investment and language identities. The implications of these findings on ELL adolescents’ language use in a broader migration space are also discussed.

Research has shown that late-arriving teen English language learners (ELLs) are deeply rooted in the sociocultural and educational system of their home country for a majority of their schooling time (Duff, 2001; Minichello, 2001). In their transition to a new society in North America, this group encounters sociocultural and linguistic differences in their daily lives. Through a lens entitled Critical Multiple Social Spaces, which combines the Multiple Worlds Model (Phelan et al., 1991), the concept of Third Space (Bhabha, 1994) and a sociocultural perspective on language use (Fairclough, 2001; Pennycook, 2010), this qualitative case study focuses on 10 Chinese ELL adolescents who came to Canada after the age of 15, and examines their cross-trajectory experiences of English practice in their daily lives and their language identities. At the time of this study, they were at the stage of completing high school and applying for admission to higher education institutions. Findings showed that this group’s language use in daily life is full of conflicts, negotiation and consolidation, not only at school as a usual space of contested language practice, but also at home, with peers and in other spaces. At school, social division existed both in and out of class, yet such social division was not merely due to ELLs’ reluctance to integrate. Participants positioned themselves differently in English Literature courses and core classes in accordance with their perceived proficiency. Home, generally regarded as a traditionally stable space of language practice, became another site of complex dynamics. Peer networks also emerged as embodying similar complications. In addition to racial and ethnic factors, age on arrival and length of residence played a significant role in social interaction, impacting both same-ethnic and cross-ethnic peer networks. Based on these findings, four categories are identified pertaining to participants’ cross-trajectory language experiences, in which English spaces are positioned differently in relation to other spaces. Equally noteworthy are the dynamics between social spaces, social relations and language use, which shape – and are shaped by – symbolic power, investment and language identities. The implications of these findings on ELL adolescents’ language use in a broader migration space are also discussed.