This article reports the concluding part of a larger study on retention of key procedural and conceptual concepts in differential and integral calculus among Croatian and Danish university students in non-mathematics study programmes. The first parts of the study examined the retention of the students' knowledge through a questionnaire testing core calculus concepts in derivative and integration given two and six months after the students had passed an exam testing those concepts. In the present article we continue to explore the retention of core concepts in derivative through a mixed method approach examining the knowledge of 10 second-year nonmathematics students 14 months after they took the course. The result showed that there were several negative met-befores and met-afters affecting the students' retention.
In the recent years, competitions in school subjects have slowly but surely occupied a prominent place in the educational process and now play an important role in motivating and inspiring students to enhance their learning. This paper presents a brief overview of the competitions in computer science in Croatia, highlighting their strengths and weaknesses and stressing their importance and application in the methodology of teaching. Keywords: competition in computer science, development of social skills, teaching methods in computer science. -----SAŽETAK U posljednje vrijeme natjecanja iz školskih predmeta polako ali sigurno zauzimaju istaknuto mjesto u odgojno-obrazovnom procesu te imaju značajnu ulogu pri motivaciji i inspiriranju učenika za pojačan daljnji rad. U ovom radu je dan pregled natjecanja iz informatike u Hrvatskoj, s posebnim naglaskom na njihove prednosti i nedostatke te uz isticanje njihove važnosti i primjene u metodici nastave informatike. Također su prikazane te primjerima potkrepljene pozitivne posljedice sudjelovanja učenika na natjecanjima, poput pojačanog razvoja socijalnih i spoznajnih vještina. Ključne riječi: metodika nastave informatike, natjecanja iz informatike, razvoj socijalnih vještina.
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