STF(Strategic Teaching Framework)：是印第安纳大学与North Central Ragional Education Laboratory的合作项目。项目主持者：Thomas Duffy，Beau Jones以及Randy Knuth。



STF is an multimedia information resource designed to support teachers in metaphorically visiting three constructivist classrooms in which they can watch a period of instruction, get perspectives on critical attributes of the teaching as they watch, and access a rich conceptual database.   (Tammy Chaney-Cullen & Thomas Duffy.Strategic Teaching Framework:Multimedia to support Teacher Change: November 20, 1998)



STF： 一种视频形式的交互式信息系统，旨在帮助个人发展面向问题解决的教学策略。    



NCTM(the National Council of Teachers of Mathematics): 全美数学教师理事会，1989年发布了《学校数学的课程和评价标准》（2000年修订为《学校数学的原则和标准》），1991年发布它的姊妹篇：《学校数学的专业教学标准》。