Teaching history requires clear, detailed and subject specific language. History teachers teaching in a second language are confronted with students' second language limitations, which likely have an aggravating impact on their application of pedagogical content knowledge (PCK). We analysed and compared 12 Dutch spoken and 12 English spoken paired history lessons in junior grades 7 and 9. Contrary to our expectation, we found a strong similarity of the teachers’ PCK application in both grades 7 and 9, irrespective of the used language. The PCK application in both grades and languages was of average quality, while the PCK used in grade 9 was more advanced.
Teaching history requires clear, detailed and subject specific language. History teachers teaching in a second language are confronted with students' second language limitations, which likely have an aggravating impact on their application of pedagogical content knowledge (PCK). We analysed and compared 12 Dutch spoken and 12 English spoken paired history lessons in junior grades 7 and 9. Contrary to our expectation, we found a strong similarity of the teachers’ PCK application in both grades 7 and 9, irrespective of the used language. The PCK application in both grades and languages was of average quality, while the PCK used in grade 9 was more advanced.
The European eel (Anguilla anguilla) is a delicacy fish and an integral part of the Dutch culinary history. However, the stock of adult eel has decreased significantly due to a precipitous recruitment of glass eel fall. This relates to multiple factors including obstacles in migration pathways, loss of habitat and chemical pollution. Consequently, Anguilla anguilla has become a critically endangered species and is protected under European legislation. One possible solution, explored on laboratory scale, is the captive reproduction of eels and growth of glass eel in aquaculture. A big challenge of this technique is the limiting aspect of possible nutrients for the eels in the larval stage, as the diet must be delivered in micrometric capsules (< 20 µm) with a high protein content. Such diets are not yet available on the market. Electrohydrodynamic atomization (EHDA) is a novel option to prepare a micro-diet suitable for eel larvae. EHDA is especially interesting for its narrow size distribution capabilities and for applications which require submicrometric sizes. This project aims to evaluate the use of EHDA to produce high protein content micrometric size capsules for feeding larval eels. If successful, this would assist in the captivity production of glass eel and to make the eel culture independent of wild catches, restoring the culinary market. The project will be conducted in two phases. Firstly, tests will be conducted to evaluate the necessary conditions of the capsules using EHDA. Subsequently, the obtained capsules will be tested as feed for eel larvae. The main objective is to favour the development of a more sustainable eel culture, regarding the possibilities of investigating the current fish in natura option and exchanging it for a captivity one.
