The Oswal Amazon Store has CBSE Workbook Class 3 for all subjects, including math, science, social science, English, and Hindi. The whole CBSE/NCERT syllabus is covered in these chapter-by-chapter videos for class 3.

https://www.amazon.in/stores/page/A8336FD1-6572-4A69-9BAF-0A9883951D6C