Reaction cycle of calcium as an experimental support for teaching chemical reaction as critical subject-matter in lower secondary education
2020
Abstract
Chemical reactions are among the key and critical points of chemistry teaching and learning in lower secondary school. Implementation of experimental calcium cycles in pupils' laboratory work was proposed as an innovation of teaching the topic of chemical reactions and developed in four steps based on design-based research approach.
The original proposal of innovation was commented and subsequently verified and evaluated by in-service teachers in various regions of the Czech Republic in their chemistry lessons. Teachers found this innovation favourably but suggested some optimizations proposals.
Based on the teachers' comments and optimizations proposals, modifications of the laboratory exercise were proposed.