Hey bro ghulamal15
past papers are good source of preparing e.d.s papers i would suggest to prepare last 15to 20 years papers . reading whole book is good but wheb a person is having good score with this method y should one has to go through whole book . Some say prepare last 10 year papers i would say 15 to 20 years.
prepare lists from selected past papers it will help list in a manner.........
1- scientists
haithem 2012
razi 2011 and so on (pakka ata hai ye question)
2 - in a same manner prepare list of reasoning
3- differentiations
4- abbreviations
5- prepare whole solar system
6- then 10 marks questions list from same papers
7- then 5 marks questions list
8- short questions list ( these questions are out of questions these years because examiner is not giving short questions of 2 marks) but you should prepare them to be on the safe side
Note : dont prepare past papers in a manner that preparing whole 1996 paper then 1997 and so on........ because in this manner things are going to mix up . prepare from lists you already have . First go through all reasonings and then scientists in this way you r going to prepare all past papers and complications will be minimum . And preparing lists is not going to take time it takes hardly a day or 2 . Best of Luck