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Secondary school chemistry teacher's current use of laboratory activities and the impact of expense on their laboratory choices

机译：中学化学老师当前对实验室活动的使用以及费用对其实验室选择的影响

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In the United States with the Next Generation Science Standards (NGSS)'s emphasis on learning science while doing science, laboratory activities in the secondary school chemistry continues to be an important component of a strong curriculum. Laboratory equipment and consumable materials create a unique expense which chemistry teachers and schools must deal with if laboratory activities are part of the chemistry curriculum. While other barriers impacting teachers' use of laboratory activities have been researched, the impact of expense on teachers' choices is not as clear. This study sought to understand secondary school chemistry teachers' current laboratory practices and the impact expense has on their use of laboratory activities in their classroom. Using an online survey and follow-up interviews, the study found that a majority of secondary chemistry teachers surveyed use laboratory activities, though not always including scientific practices advocated by NGSS. The frequency of laboratory activities used by teachers was not statistically impacted by school type, available funds for materials, or processes to obtain funds, but was impacted by teachers' personal ideas. Interviews provided more information about the teachers using laboratory activities regularly and those not. While most teachers are using laboratory activities regularly at the current funding levels, expense, in terms of monetary and time expenses, was shown to impact the specific choice of laboratory activity. Implications for chemistry curriculum reform including the usage of laboratory activities in chemistry courses are discussed along with implications for chemistry teacher professional development.
机译：在美国，下一代科学标准（NGSS）强调在做科学的同时学习科学，中学化学的实验室活动仍然是一门强大课程的重要组成部分。如果实验室活动是化学课程的一部分，则实验室设备和消耗性材料会产生独特的费用，化学老师和学校必须处理这些费用。尽管已经研究了影响教师使用实验室活动的其他障碍，但费用对教师选择的影响尚不清楚。这项研究旨在了解中学化学老师当前的实验室实践以及费用对他们在课堂上使用实验室活动的影响。通过在线调查和后续访谈，该研究发现，大多数接受调查的中学化学老师都使用实验室活动，尽管并不总是包括NGSS提倡的科学实践。教师所使用的实验室活动的频率在统计上不受学校类型，材料可用资金或获得资金的过程的影响，但受教师个人想法的影响。访谈提供了有关教师定期使用实验室活动以及不定期使用实验室活动的更多信息。尽管大多数教师在当前的资金水平上定期使用实验室活动，但事实证明，费用（在金钱和时间上的花费）会影响实验室活动的具体选择。讨论了对化学课程改革的影响，包括对化学课程中实验室活动的使用，以及对化学教师专业发展的影响。

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