Acosta , Patricia. English 4. Happy Campers Student book : English as the main foreign language / A. Llanas, L. Williams ; desing & ill. R. Martinez ; ill. G. Contorakes ; Ministry of Education of the Republic of Azerbaijan. - Bakı : Çaşıoğlu, 2023. - 76 s.

Happy Campers is a collection of 7 American English language learning books that aim to foster positive and memorable learning experiences to build students’ confidence and self-esteem. Through the activities in Happy Campers, students become part of a child-centered community—they work together to achieve goals, singing, playing, and repeating as they complete tasks, and most of all, have fun!