I had trouble installing pi-hole on my Raspberry Pi. Looks like this was due to problems reaching the repository mirrors. Take a look here: https://www.raspbian.org/RaspbianRepository
http://googleweblight.com/i?u=http://www.tomsguide.com/answers/id-1951169/google-chrome-slow.html&grqid=JP2-cO1H&hl=en-IN
Interestingly, turning off hardware acceleration actually seems to have worked...
http://m.timesofindia.com/home/education/news/cabinet-clears-plan-to-fail-students-in-classes-v-viii/articleshow/59889883.cms
And who's responsible for the hundreds who were promoted to the next class since 2010 who would otherwise not have made it? What has changed since then that the logic used in 2010 does not apply any more?