Biology is a science that involves study of the diversity of living organisms. This diversity has always generated questions and has motivated cultures to seek plausible explanations for the differences and similarities between types of organisms. In biology teaching, these issues are addressed by adopting an evolutionary approach. The aim of this…

The objective of this study is to demonstrate that the criteria of didactical suitability, proposed by the theoretical framework known as the Onto-Semiotic Approach (OSA) of mathematical knowledge and instruction, are powerful tools for organizing the reflection and assessment of instruction processes carried out by mathematics teachers. To this…

In this article Brazilian teacher, Hugo Dart, describes how he partnered with Polish teacher, Karolina Isio-Kurpinska, to set up an online community where students from different places could interact and make discoveries about each other's culture while practicing their English. The article discusses the ten-week project that was developed for…

The aim of this work is to adapt and test, in a Brazilian public school, the ACE model proposed by Borkulo for evaluating student performance as a teaching-learning process based on computational modeling systems. The ACE model is based on different types of reasoning involving three dimensions. In addition to adapting the model and introducing…

The article describes and discusses the use of focus groups and questionnaires to evaluate educational printed material for high school level art teachers prior to publication. The material consisted of "The Notebook of the Investigative Teacher," created by the Instituto Itau Cultural to help teachers develop critical skills in…

The Universidade de Caxias do Sul (UCS) elaborated the cooperative project called "The engineer of the future", with the objective of promoting science and engineering among high school teachers and students. This project aims to improve the quality of the teaching and to increase the interest of students in technological areas, leading…

Early morning school schedules are in the opposite direction to the sleep-wake cycle in adolescence and early adulthood. This conflict leads to sleep deprivation and irregular patterns whose consequences are scarcely explored. This article discusses the effects of three educational experiences with high school students, parents, teachers, and…

In this article we analyse the interaction between a high school chemistry teacher and her students from two different classes, emphasizing how emotions, affects and feelings contributed to, or obstructed, the dynamic of interactions. The data come from an ethnographic research approach and include videotapes of the lessons, interviews and field…