Best rating plugin


I just joined rails and i need to create a website that rates
products. Been googling but the rating plugins are either outdated or
obsolete. Can someone point me to a working tutorial for a rating


I am new to Ruby on Rails and downloaded the Instant Rails package to start and I used this tutorial:

The tutorial is preatty good and easy but I got stuck on this section below, could anyone help me? THANK YOU. This is the link that will bring you to the same place I got stuck, is about "Make Mmebers Page"

I done everything by the tutorial but can`t get this done, how do I write in there?