If you can get someone to work with you, print out some manuscript paper and get the other person to write successive notes. Start with single note progressions, so A goes to B goes to C goes to B, etc. As that becomes easy, increase to 3rds, 4ths, 5ths and 6ths, and then mix them up - moving up and down.
Reading is much faster and easier once you are reading by pattern rather than single notes. If you don't have soemone who can work with you 15 minutes a few times a week, a sight-reading book will build on the basic patterns more than a beginner's book - but the pieces are not really interesting.
You can also down load and print tests from PracticeSpot.com so you have practice naming notes. This will only help so far, though. The key to reading is pattern recognition in hand with keyboard visualisation.
Good luck.