Crochet Into Front Or Back Post

Stitches are worked around the post in the previous row/round. This tutorial shows double crochet (US) but the principle is the same for other stitches.

Front Post:

Steps 1-2: Yarn over, insert hook from front to back around post of next stitch, yarn over.

Step 3: Draw up a loop, yarn over and draw through the two loops on hook. 

Step 4: Yarn over and draw through two loops on hook.

Step 5. Ta da!

Back Post: 

Steps 1-2: Yarn over, insert hook from front to back around the post of next stitch, yarn over. 

Step 3: Draw up a loop, yarn over and draw through the two loops on hook.

Step 4: Yarn over and draw through the two loops on hook.

Step 5: Ta da!