Practice Research Of Chemistry Learning Task Chain Designing

This thesis with emphasizing scientific and standardized of the chemistry instructional dedign system for study background, taking the fist hand fulfillment material-classroom teaching factual records and teaching desinge records as to study foundation,.deeply analyze the units of the chemistry learning task chain-the learning task's meaning and function. To probe into the chemistry learning task chain's fundamental meaning and types. Made a reasonable definition for the chemistry learning task chain throng the analyzing of specific examples: the chemistry learning task chain is the collection of the chemistry learning tasks.,the tasks have clear gradation and close structures ,then work for realizing similar teaching goals and completing similar teaching contents. Throng the analyzing of specific examples ,the chemistry have four types :side byside,gradation , mixed and single,further analyze the length of the chemistry learning task chain.Further, we recognize the chemistry learning task chain throng a new point of view;look the chemistry learning task chain as a cricket.and describe the characteristics of the cricket. Throng the analyzing of specific examples president three clues to connect the crickets.:STS ,logic of the chemistry and the history of the science.the clue of the cricket can not only connect the crickets, and also give the spirit to the teaching designing.We hope that the research result can provide new ways of thinking for the teachers when they design,can enrich and consummate chemistry instructional design theories in the meantime. We also hope this text can be a template for the researches taking practice as foundation,and give other researchers with inspiration.