Rounds 5-9 & the front loop only

Here's what you need to do to crochet the rest of the St. Patty's Day hat:

Rounds 5-7: 18 sc (18)
Round 8: [inc flo, 2 sc flo] x 6 (24)
Round 9: [3 sc, inc] x 6 (30)

What's this? Another new abbreviation? flo means, you guessed it, "front loop only." With the right side of your work still facing out, insert the hook under the side of the horizontal V that's closer to you:

hook under front loop only

Crochet each stitch like you normally would. You'll know you've done it correctly because there'll be a ridge on the inside of your piece:

finished round of front loops only

To finish, invisible fasten off: