a b s t r a c tThe purpose of this study was to determine the opinions of secondary school students in Turkey regarding renewable energy resources. To this end, a 26-item questionnaire, developed by Kılınç et al. [1], was administered to a total of 445 students in seventh and eighth grades. In addition, three open-ended questions were asked of the students in order to determine their level of knowledge regarding renewable energy resources and power stations. The study data were analyzed using the SPSS statistical package program. The study results revealed that most students first heard about the concept of renewable energy when they were in secondary school (55.7%) and elementary school (24.5%). In addition, the students generally knew about renewable energy sources and their importance, although they lacked knowledge about certain aspects of renewable energy. Furthermore, the students were, in general, of the opinion that electricity from renewable energy resources is cheap, reliable, and fully replenishable; that power stations producing electricity from these energy sources are generally safe and harmless to living organisms; and that their use does not contribute to global warming.

As a chemistry education game, Ion Hunters was developed for university-level students to practice naming anions and cations and writing the formulas for ions that are frequently encountered in chemistry lessons. This game, which is played by two students at a time, is an effective tool for teaching about ions and makes the lesson more enjoyable by providing an opportunity for students to associate a chemistry topic with having fun. When the game is completed, the analysis sheet is used to determine which student has written the highest number of correct answers on the answer sheets; this student becomes the winner of the game.

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The aim of this study is to determine pre-service elementary science teachers' knowledge level about greenhouse effect. In the study, the questionnaire of 36 items was applied to 319 pre-service elementary science teachers by using scanning model. Percentage (%), frequency (f) and single factor variance analysis were done by using SPSS statistical package program for the data gained from the application. As a result of the analysis it was stated that the students have some misconceptions about greenhouse effect and that there was not a significant difference among the pre-service elementary science teachers' knowledge level about greenhouse effect according to their grade level.