The education teacher of Lanzhou University found that mathematics learning should focus on the teacher's narration, clarify the narrative ideas of teaching materials, listen to the key points and difficulties of the teacher's narration, stride over the learning obstacles of attending classes without interference, take some notes on the basis of understanding, and fundamentally understand the principle of the topic. It's good to learn big education. Lanzhou Xueda Education Telephone Chengguan Square West Exit Campus 400 8 19 9978 ext.157 Elite Square West Exit Campus 400 8 19 9978 ext.160 Qilihe West Station Sunshine Home Campus 4008/kloc-. 8+058 Elite Sunshine Garden Campus 400 8 19 9978 ext.1Xigu Hongsheng Campus in Xigu District 400 8 19 9978 ext.159 Elite Xigu Campus 4008/kloc-.