Construction And Application Of Primary School Science Knowledge Map

The development of information technology has brought convenience to life and promoted the modernization of society.At the same time,the information construction of education is also in an orderly way.The proposal of action plan of education informatization 2.0 marks the era of education informatization construction.It emphasizes the view of large resources based on the Internet,which includes the relationship between knowledge and knowledge,namely knowledge graph.Knowledge graph is essentially a large-scale semantic network.The whole network consists of numerous nodes and nodes connecting.Each node represents an entity in the real world,while the connection between nodes represents the relationship between different entities.The relationship between knowledge is described mainly by knowledge visualization technology,which can provide practical and valuable reference for the subject research.It can display a large number of disorderly knowledge in a structured way,which enables learners to grasp the relationship between knowledge structure and knowledge intuitively and accurately,and improve the quality and efficiency of learning.The research object of this paper is the knowledge graph of science curriculum in primary school.The application of the knowledge graph of primary school science course in the primary school science course can better show the logic between the scientific knowledge,and its graphical structure can arouse the interest of primary school students'learning and bring good teaching effect.In this paper,according to the knowledge characteristics of primary school science,the paper uses Neo4j graph database to construct the visualization knowledge graph of primary school science knowledge,including:raw data preparation:using web crawler technology to analyze web pages in the early stage,and to complete the crawling work of primary school science subject data source;The data of primary school science discipline are clear:after climbing to certain data,according to the hierarchical structure relationship between knowledge fields,knowledge units and knowledge points classified by the data hierarchy of primary school science disciplines,Beautifulsoup and regular expression matching are used to extract,screen and match corresponding data information.Using Protege to construct the ontology,and extract the triples.According to the structure of the graph database,the data is further sorted out,and the data is imported into the Neo4J graph database to construct the knowledge graph,and the visualization of the data is completed.Then,the query system of the primary school scientific knowledge graph is designed and developed by using D3.js framework combined with the Neo4j database.The main functions of the system include:query,add,delete,modify and query knowledge graph nodes and their properties,import,search and screen and other interactive functions,and test the system.Finally,the system based on the application of knowledge graph and constructivism related teaching theory is used to design a primary school science course based on the case of "The Food's Travel In The Body",and makes a brief analysis of the application process and expected effect of the knowledge graph in the teaching plan.From the teaching cases designed,it can be seen that the use of knowledge graph can clearly and intuitively construct the logical relationship between the overall structure and knowledge points of primary school scientific knowledge.On the one hand,it can promote students' cognition of the overall structure of scientific knowledge and the teachers' grasp of the key and difficult points of scientific knowledge,on the other hand,it can cultivate the scientific thinking ability and inquiry spirit of primary school students,Improve scientific literacy and enhance scientific awareness.The design and analysis of the teaching plan provides a reference for the application of knowledge graph in classroom teaching,and can help teachers to solve the problems and shortcomings in teaching practice to some extent,and promote the optimization of the teaching methods of science and the improvement of teaching mode in primary schools.How to make full use of knowledge graph to carry out teaching activities to achieve the best teaching effect,and it will be the main problem faced by the development of knowledge graph in the field of education.