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Direct linkRicardo Colaço; Pedro Freitas; Luis Catela Nunes; Ana Balcão Reis – Large-scale Assessments in Education, 2025
We analyse the PISA-reported convergence in the performance of private and public schools in Portugal. When PISA sampling weights are used, the number of students enrolled in those types of schools and specific grades/tracks of study differs significantly from official population figures. To account for those differences, we apply a…
Descriptors: Foreign Countries, Achievement Tests, International Assessment, Secondary School Students
Download full textViseu, Floriano; Pires, Ana Luísa; Menezes, Luís; Costa, Ana Maria – International Electronic Journal of Elementary Education, 2021
The use of different registers to represent mathematical concepts enhances understanding. For example, rational numbers can assume pictorial, symbolic and natural language representations and this kind of change improves learning. Based on these assumptions, a teaching experiment for the learning of rational numbers by 2nd grade students was…
Descriptors: Semiotics, Mathematics Instruction, Grade 2, Elementary School Students
Faria, Ana Raquel; Viseu, Floriano; Gomes, Alexandra; Aires, Ana Paula – International Electronic Journal of Elementary Education, 2021
Due to their abstract nature, representation of mathematical concepts through different registers favors their understanding. In the case of ''sequences and regularities'', it becomes propitious the exploration of different registers of representation in the institution of topics, such as term, order, formation law, and generating expression.…
Descriptors: Grade 3, Elementary School Students, Mathematical Concepts, Mathematics Instruction
Tabacu, Lucia M.; Watson, Silvana Maria; Chezar, Laura C.; Gable, Robert; Oliveira, Célia R.; Lopes, João – Preventing School Failure, 2020
We examined the type of errors on multiplication and division computation problems of 326 rising fifth graders enrolled in four elementary schools in Northern Portugal. We further examined whether there was a difference in the number of errors across age and whether there was an association between students' performance on number knowledge and…
Descriptors: Error Patterns, Misconceptions, Mathematics Achievement, Mathematics Instruction
Watson, Silvana Maria R.; Lopes, João; Oliveira, Célia; Judge, Sharon – Journal for Multicultural Education, 2018
Purpose: The purpose of this descriptive study is to investigate why some elementary children have difficulties mastering addition and subtraction calculation tasks. Design/methodology/approach: The researchers have examined error types in addition and subtraction calculation made by 697 Portuguese students in elementary grades. Each student…
Descriptors: Error Patterns, Foreign Countries, Elementary School Students, Mathematics Instruction
Colaco, Dora; Mineiro, Ana; Leal, Gabriela; Castro-Caldas, Alexandre – Clinical Linguistics & Phonetics, 2010
Literature suggests that illiterate subjects are unaware of the phonological structure of language. This fact may influence the characteristics of aphasic speech, namely the structure of paraphasias. A battery of tests was developed for this study to be used with aphasic subjects (literate and illiterate), in order to explore this topic in more…
Descriptors: Morphology (Languages), Aphasia, Speech Impairments, Word Recognition
