The education resource grid is an effective measure to solve the problem of sharing distributed education resources at present. First, with regard to the education resource sharing in secondary and elementary schools, a hierarchy model of education resource grid is proposed and the functions of nodes in each layer are defined in this paper. By comparing with the European Data Grid, the education resource grid is analyzed with its characteristics. Then based on the hierarchy grid model, some factors, which influence the performance of replica creation strategy, are analyzed and a dynamic replica creation strategy (EDRS) is proposed by introducing two parameters, i.e., the network bandwidth and file size. With the data grid simulation tool OptorSim, the performances of EDRS with Caching-LRU, Caching-LFU and the economic model strategy are compared respectively. At last, the influence of different strategies on the performance of the education resource grid system is analyzed by synthesizing each parameter. The result indicates that the EDRS has a better system performance in applications of the education resource grid.