The article analyzes the methodological approaches and strategies of the textbook “English for natural sciences (A2-B1)” in the system of preparing bachelors for the certification exam in a foreign language at level B2. The rationale for the structure of the manual and the logic of selecting textual material is given, the principles for developing training tasks and exercises are concretized. The author concludes the relevance of systematic and consistent training of bachelors to fulfill the complex task of improving the level of English language proficiency raising it to the upper-intermediate level (B2) in all types of speech activity, as well as mastering professional vocabulary and scientific discourse skills on specialized topics. Thus, it is required to strictly adhere to the verified logical structure of the manual, to increase the interest and motivation of students for self-education, to calculate the time to complete various types of tasks, to have modern technical equipment, and also to conduct regular testing.