A few patterns require working in to the front and back loops of a row so I have used my great powers of photoshop to highlight the important parts of the stitches.
Which loop is which?
The back loop is at the wrong/inside of the work (green)
The Front loop is at the right/outside of the work (pink)
Which loops first?
Most patterns will have you working it to the front loops first but the principal is the same either way.
Just read your pattern carefully and don’t panic
Have I done it right?
When you have completed a round in the front loops you will be able to see the back loops forming a ridge on the inside/wrong side of your work.
Now work in to the back loops.
Some patterns will require work in to the stitches just made and/or a change of colour first but the idea is the same.
What should it look like now?
You will have two rows of normal looking stitches next to each other.
And there you have it. I have used this technique in;
I write this as one row if you are in doubt the rook pattern is free and hosted here on my blog. If the pattern calls for front OR back loops the idea is the same but just don’t work in to the other loop.