一位教师把教材比做银行，每个知识点好像银行里的资金。银行要发挥效益，重要的一点就是用活资金。同样的道理，要最大限度地利用教材，发挥教材的优势和功能，就必须用活教材，对教材进行科学、合理的加工。　　例如：九年义务教育教材第十二册，在学生掌握了圆锥体积计算公 A teacher compared the textbook to a bank, each knowledge point like the money in the bank. Bank to play a benefit, it is important to use the living capital. The same token, to maximize the use of teaching materials, teaching materials to play the advantages and functions, we must use living materials, teaching materials for scientific and reasonable processing. For example: nine years of compulsory education textbook twelfth volume, the pupil mastered the cone volume calculation