What Kind of Textbooks do Schools Need? An Study Based on the Investigation of Teachers' and Students' Use of Chemistry Textbooks
Teachers and students are textbook users in school education,and thus the compilation of textbooks must meet the needs of teachers' teaching and students' learning.The feedbacks from teachers and students using textbooks are the important basis for revising and improving textbooks.The study investigated teachers' and students' use of chemistry textbooks in secondary schools and proposed that the textbook compilation should adhere to the unity of "paradigm" and "authority" in content selection;the textbooks' role should be the fusion of "learning" and "teaching";the textbook compilation should be based on the curriculum standard;and at the same time,it should consider the influence of test evaluation.These should be taken as the starting point and references for textbook compilation.
This paper studied the technological conditions of the preparation of Chitin and Chitosan. In this experiment , we pay more attention to the different elements so that we can search for the best way to product Chitosan.