The peculiarities of forming, developing and the composition of knowledge sign-symbol, universal educational actions in the direction of process learning biology in old school are considered in this article. The process of modeling and reforming sigh-symbol models for the developing student’s educational universal actions are disclosed in this article too. The measuring tools, fixing the level of development universal educational actions in quantitative ratio are offered also in this article. The educational method, application of which causes positive dynamic of level developing universal education actions, the increasing the level of learning biological knowledge of students because of the application of system of fends sigh-symbolic clarity are developed by the authors of this article. The model, reflecting the essence of method of application sigh-symbolic visibility in biological education and methodological conditions, compliance of which must provide positive results from the using of developed model is given also in this article.