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O ensino da matemática na educação fundamental é um desafio para docentes e pesquisadores.  Para superar essas barreiras técnicas metodológicas o lúdico tem sido utilizado. O lúdico está associado a dança, a música e ao jogar, consiste em um mecanismo poderoso para aumentar o interesse dos alunos por alguma disciplina ou conteúdo. Essa metodologia torna o aprendizado mais divertido e interessante, possibilitando o ensino do conteúdo de uma maneira leve. Devido a sua importância, este trabalho tem como objetivo utilizar o lúdico como ferramenta no auxílio do ensino de frações. A pesquisa foi realizada em uma Escola Municipal, com 30 alunos da turma do 6º ano, sendo 13 do sexo masculino e 17 do sexo feminino. Foi feito uma análise da temática, através de um questionário, a aplicação do jogo e uma avaliação no final das atividades. Verificou-se que, com a inserção dos jogos nas aulas, elas se tornaram mais dinâmica e prazerosa, promovendo uma maior interação entre os alunos/material-manipulável/professor, que contribuiu para uma melhora na aprendizagem do conteúdo de frações.

Drying can be defined as a simultaneous heat and mass transfer process between product and air drying. These phenomena have occurred due to thermal and moisture gradients and they are affected by different parameters. The inadequate management of this process can cause severe damage to the product such as cracking, loss of nutritional properties and even loss of the product quality. Thus, this paper proposes a numerical study of heat and mass transfer that occurs during the rough rice drying process, using the commercial software ANSYS CFX®. Herein the grain was considered as ellipsoid of revolution.

Resin transfer molding (RTM) is one technique that has been used to produce polymer composites, which consists in injecting a thermoset pre-catalysed resin into a closed mold containing a dry fiber preform. In this sense, this study aims to investigate the effect of the calcium carbonate content (CaCO3) in the polyester resin during the RTM process. Several experiments were conducted using glass fiber mat molded in a RTM system with cavity dimensions 320 x 150 x 3.6 mm, at room temperature, and different injection pressure (0.75 bar) and CaCO3content (0, 10, 20, 30 and 40%). Results of the physical parameters such as viscosity, permeability, and mobility, and flow front position of the resin into the mold along the RTM process are presented and analyzed. From the results was concluded that the higher the injection pressure and lower CaCO3content into the resin, the lower filling time.

<p>Nowadays, to understand and, ultimately, to control climate changes, considered one of the main international current topics, it is imperative to reduce the CO<sub>2</sub> concentration in the atmosphere, otherwise the environmental, economic, and social consequences will be enormous. The reduction of CO<sub>2</sub> can be carried out using several options, each one having technological, environmental, and economic advantages and/or disadvantages. In this regard, the CO<sub>2</sub> geological sequestration represents itself as an alternative, which is technologically feasible in depleted conventional deposits of oil and natural gas, in abandoned collieries and/or deep unexploited coal seams, and in deep saline aquifers. In the current state of knowledge, the geological sequestration of CO<sub>2</sub> in Portugal, among all available options, will only be possible in existing coal abandoned mines, and deep saline aquifers.</p> <p>In 2022, a highly interactive work was carried out by secondary school students from Dr. Machado de Matos School Grouping, and researchers from the Fernando Pessoa University – Porto, the main goal being to study and understand the role of coal, in layers in abandoned Portuguese mines, in CO<sub>2</sub> geological sequestration. For this purpose, the students were confronted with different data published in scientific journals and, ultimately, they tried to understand which coals and which Portuguese mines are more suitable to the CO<sub>2</sub> sequestration. Additionally further work will be developed regarding air quality of the place where the school is located.</p>