Transcription: There are two techniques called increasing and decreasing that help you shape your work. In this lesson, you will increase in single and double crochet, decrease in single and double crochet. For this lesson, you will need several rows of crocheted fabric from previous lessons. To increase, you work two or more stitches into one stitch. Go ahead and try it. On your single crochet fabric, work two single crochets into the same stitch. You have just increased one stitch on this row. On your double crochet fabric, work two double crochets into the same stitch for a double crochet increase. Easy e ...