New English textbooks for 2021-2022 have been developed based on the Single National Curriculum 2020 guidelines. The document discusses and explores these new textbooks for classes 1 through 5. It notes that the textbooks contain various exercises and activities to enhance students' reading, pronunciation, spelling, vocabulary, and language skills. Examples of exercises include questions and answers, filling in blanks, identifying pictures, matching letters to words, discussions, spelling enhancement, and more. The document highlights over 40 different types of exercises contained in the hidden treasures within the new textbooks.