The system of reviewing posts on SE sites has been improved some time ago. Now the review tasks are compiled in stacks and shown one review post at a time. All possible actions that you can perform with the post are shown in the top right corner.
Every user with 1000 reputation may review posts! There are so far 7 such users in our community (and yet more to come!). Let's go and try the new review system out.
Click on the review field in the upper left corner of the screen:
and get started!