Crochet Fundamentals

Yo

Yarn over

Standing stitch

start with a slip knot on the hook and work the stitch as normal

Invisible Join

See explanation here

Working in the 3^rd loop

See explanation here

ch

chain stitch
yarn over and draw the yarn through the loop on the hook
Starting chain stitch
With a slip knot on your hook yarn over and draw the yarn through the loop

sl st

slip stitch
insert hook in specified stitch or space, yo and draw the yarn through the loop on the hook

sc

single crochet
insert hook in indicated stitch or space, yo and pull up a loop (2 loops on hook) yo and pull through both loops on hook

BPsc

back post single crochet
insert hook from back to front to back around the post of the indicated stitch (post is in back of the hook), yo and pull up a loop (2 loops on hook), yo and pull through all loops on hook

FPsc

front post single crochet
insert hook from front to back to front around post of indicated stitch (post is in front of the hook), yo and pull up a loop (2 loops on hook) yo and pull through all loops on hook

hdc

half double crochet
yo, insert hook in indicated stitch or space, yo and pull up a loop (3 loops on hook), yo and pull through all loops on hook  

BPdhc

back post half double crochet
yo, insert hook from back to front to back around the post of the indicated stitch (post is in back of the hook), yo and pull up a loop (3 loops on hook), yo and pull through all loops on hook

FPhdc

front post half double crochet
yo, insert hook from front to back to front around post of indicated stitch (post is in front of the hook), yo and pull up a loop (3 loops on hook), yo and pull through all loops on hook

hdc2tog

half double crochet 2 stitches together
yo, insert hook in indicated stitch or space, yo and pull up a loop (3 loops on hook), yo, insert hook in next stitch or space, yo and pull up a loop (5 loops on hook), yo and pull through all loops on hook

dc

double crochet
yo, insert hook in indicated stitch or space, yo and pull up a loop (3 loops on hook), [yo and pull through 2 loops on hook] twice

Extdc

extended double crochet
yo, insert hook in indicated stitch or space, yo and pull up a loop (3 loops on hook), yo and pull trough first loop on hook (3 loops on hook) [yo and pull through 2 loops on hook] twice

BPdc

back post double crochet
yo, insert hook from back to front to back around the post of the indicated stitch (post is in back of the hook), yo and pull up a loop (3 loops on hook), [yo and pull through 2 loops on hook] twice

FPdc

front post double crochet
yo, insert hook from front to back to front around post of indicated stitch (post is in front of the hook), yo and pull up a loop (3 loops on hook), [yo and pull through 2 loops on hook] twice

Dc2tog

double crochet 2 stitches together
yo, insert hook in indicated stitch or space, yo and pull up a loop (3 loops on hook), yo and pull through 2 loops on hook (2 loops on hook), yo, insert hook in next stitch or space, yo and pull up a loop (4 loops on hook), yo and pull through 2 loops on hook, yo and pull through the remaining 3 loops on hook

dc3tog

double crochet 3 stitches together
yo, insert hook in indicated stitch or space, yo and pull up a loop (3 loops on hook), yo and pull through 2 loops on hook (2 loops on hook), [yo, insert hook in next stitch or space, yo and pull up a loop, yo and pull through 2 loops on hook] twice, yo and pull through the remaining 4 loops on hook

tr

treble crochet
yo twice, insert hook in indicated stitch or space, yo and pull up a loop (4 loops on hook), [yo and pull through 2 loops on hook] 3 times

BPtr

back post treble crochet
yo twice, insert hook from back to front to back around the post of the indicated stitch (post is in back of the hook), yo and pull up a loop (4 loops on hook), [yo and pull through 2 loops on hook] 3 times

FPtr

front post treble crochet
yo twice, insert hook from front to back to front around post of indicated stitch (post is in front of the hook), yo and pull up a loop (4 loops on hook), [yo and pull through 2 loops on hook] 3 times

ext tr

extended treble crochet
yo twice, insert hook in indicated stitch or space, yo and pull up a loop (4 loops on hook), yo and pull trough first loop on hook (4 loops on hook) [yo and pull through 2 loops on hook] 3 times

dtr

double treble
yo 3 times, insert hook in specified stitch or space, yo and pull up a loop [5 loops on hook], (yo and pull through 2 loops on hook) 4 times