Yup - sounds like a Qayg (Quilt as you go).
There are several methods. One question - Is the backing larger than the front? or are they the same size?
If they are the same size - you will need to add something like bias tape or straight fabric strips to attach them together - there is a tute right here. She used something like steam a seam on the back and then sewed them down. It gives good pictures.
http://www.quiltingboard.com/t-36303-1.htm
In another method ( if the backing is larger than the front is), you sew the backings tog along where the batting ends so that the raw edges can be brought up and over the batting and front of the block - and then stitched down. Here is a link to that method
http://npnt.wordpress.com/putting-it-together-tutorial/
There are loads of links available on line once you determine which method to use. There are some great books available either on line or at your LQS as well - good luck.