there are some books or some online application which is best is best for guiding English of RBSE board
book you can prefer SANJIV ENGLISH PASSBOOKS
And online application like OYEEXAMS which is easily available on google playstore…..
this application provide us:
For 10th, 12th(Science, Commerce and Humanities)
1. Previous 12 years solved papers with all paper sets for Delhi, Outside Delhi and Foreign Exams 3 SETS.
2. All papers in offline download. NO Internet required every time.
3. Graphical pattern analysis of each subject.
4. Trend analysis of each chapter.