The Widely Acclaimed Number World Series Has Been Thoroughly Revised In Accordance With The Ncert Guidelines Laid Down Within The Framework Of The New Education Policy. While The Attractively- Illustrated Format Ensures That The Children Enjoy The Activities, The Planning And Sequencing Of The Units Will Enable Students To Improve Their Skills Gradually. Primers A And B And Books 1 And 2 Are A Combination Of Textbooks And Workbooks. Books 3-5 Follow The More Traditional Textbook Pattern. Books 6-8 Are Entirely New. (Also See Middle School Section For Other Details.)