余慎清,1959年8月毕业于西北师范大学生物系,同年9月由组织分配到甘肃省灵台县一中任生物教员,1989年被评为特级教师。该县条件艰苦,余老师30年安心在灵台黄土沟壑地区,为祖国大西北的教育事业贡献出青春年华,现在仍不遗余力、全心全意地搞好生物教学工作。在全县各级各类中学中,余老师第一个开展电化教学。他边干边学,不会画,就复盖在样品上拓画;无透明胶片,就将废玻璃裁成一定形状,涂上胶水或擦上蒜画;透明颜色难买,就用红蓝墨水、碳素墨水代替,迈开了电 Yu Shenqing graduated from the Department of Biology of Northwest Normal University in August 1959. In September of the same year, the organization was assigned to a biology teacher in Lingtai County, Gansu Province. In 1989, he was named a special grade teacher. The county’s conditions are difficult. Yu’s teacher has been at ease for 30 years in the Lingtai Loess Gully area and has contributed to the education of the motherland in the northwest. He still spares no effort in doing a good job in biology teaching. Among the various types of secondary schools at all levels in the county, Ms. Yu first started e-learning. He learned by doing, he could not draw, and he covered the samples; instead of transparencies, he cut the waste glass into a certain shape, coated it with glue or rubbed with garlic; the transparent color was hard to buy, so he used red and blue. Ink and carbon ink are used instead.