How to crochet - What to do at the end?

At the end of last round, you need to: 

1. Tie a knot or slip stitch in the 1st sc 

stitch of the previous round. 

2. Cut the end of the yarn in angle,thread
it through a knitters needle.

A knitters needle is a needle with
a larger eyelet, so a yarn could easily
go through it. A knitter needle
also has a blunt rounded point,
so it won't catch the wool
when you're stitching. 

3. Thread the end through 5 to 8 of the
 sc stitches of the last round.

4. Cut off the remaining yarn.