@Laks09 in india maths and rd sharma (author) are inseperable. You solve the problems in his books then you are good.both mine have been doing them from their class 5. It was never part of the text book prescribed by ncert. Apart from that my young man loves to solve from the russian books. He feels irodov and physics go hand in hand while preparing at hs. ( he got hooked when a guest teacher talked about them) You can look up maths here Maths | Search Results | Mir Books And also pick up worksheets from singapore maths and competitive imo worksheets. I know when it comes to maths i don't need to tell you anything. A bad teacher is all it takes to break your kids problem solving confidence..and interest in a subject like maths .