Yarn over twice and insert hook into stitch.
Yarn over again and pull through stitch. There should be four loops on the hook.
Yarn over again and pull through first two loops on hook.
There will be three loops on the hook now. Yarn over and pull through the next two loops.
There will now be two loops on the hook. Yarn over again.
Pull through the last two loops on the hook. Treble (triple) crochet is complete.