В конце каждого учебника есть словарь (на англисском)

That's correct! At the end of most textbooks, you will find a glossary or a dictionary to help you understand and learn important vocabulary words. These dictionaries are usually in English and provide definitions or explanations of key terms used throughout the textbook. It's a great resource to use when reviewing or studying for your exams. Make sure to take advantage of the glossary to clarify any unfamiliar terms and reinforce your understanding of the subject matter.