STEP 1: Follow @Scholastic on Twitter at www.twitter.com/scholastic.

STEP 2: We'll announce the two-day giveaway on August 18, 2010 with the hashtag #BookElf.

STEP 3: Choose the book you want from our Back To School Guide below.

STEP 4: Tweet @Scholastic with the hashtag #BookElf and the title of the book you’d give to a child.

STEP 5: We'll enter you into the giveaway with each hashtag #BookElf you tweet between August 18-19, 2010.

STEP 6: We'll select and announce 10 random winners on August 20, 2010 around 1pm ET. We will send winners the book from their tweet.

Read the complete giveaway rules here

Preschool Day Hooray! Author: Linda Leopald Straus Illustrator: Hiroe Nakata Ages: 2-5

How Do Dinosaurs Go to School? Author: Jane Yolen Illustrator: Mark Teague Ages: 3-5

Noodles: I Love School Author: Hans Wilhelm Ages: 4-7

Dr. Seuss Learning Cards Author: Dr Seuss Ages: 3-5

Dr. Seuss Learning Cards: Opposites Author: Dr. Seuss Ages: 3-5

Ready for Kindergarten, Stinky Face? Author: Lisa McCourt Illustrator: Cyd Moore Ages: 4-7

I'm Your Bus Author: Marilyn Singer Illustrator: Evan Polenghi Ages: 4-8

Sight Words Kindergarten Author: BOB Books Ages: 4-6

Sight Words First Grade Set Author: BOB Books Ages: 4-6

Ruby Bridges Goes to School Author: Ruby Bridges Ages: 4-8

Clifford's First School Day Author: Norman Bridwell Ages: 4-8

Clifford's Goes to Dog School Author: Norman Bridwell Ages: 4-8

Fluffy Goes to School Author: Kate McMullan Illustrator: Mavis Smith Ages: 4-8

Angel Cat Sugar: Sweet School Day Author: Ellie O'Ryan Illustrator: Sachiho Hino Ages: 6-8

David Goes to School Author: David Shannon Ages: 4-8

Off to Kindergarten Author: Tony Johnston Illustrator: Melissa Sweet Ages: 4-8

Happy School Year Author: Susan Milord Illustrator: Mary Newell De Palma Ages: 4-8

The New Bear at School Author: Carrie Weston Illustrator: Tim Warnes Ages: 4-8

Appleville Elementary: Fire Alarm Author: Nancy Krulik Ages: 5-8

Appleville Elementary: The 100th Day Author: Nancy Krulik Ages: 5-8

Appleville Elementary: First Day Author: Nancy Krulik Ages: 5-8

The Ultimate Homework Book Author: Scholastic Grades: 3rd to 6th

Reading & Math Jumbo Workbook Author: Scholastic Grades: pre-k to 4

100 Math Activities Kids Need To Do By... Author: Scholastic Grades: 1st to 6th

Everything You Need to Know About Geography Homework Author: Scholastic Grades: 4th to 6th

Everything You Need to Know About English Homework Author: Scholastic Grades: 4th to 6th

Get Ready for... Author: Scholastic Grades: K to 5th

Scholastic Children's Encyclopedia Author: Scholastic Ages: 8-12

Scholastic Children's Dictionary Author: Scholastic Ages: 8-12

Scholastic Children's Thesaurus Author: Scholastic Ages: 8-12

Pencil of Doom! Author: Andy Griffiths Ages: 9 & up

Treasure Fever! Author: Andy Griffiths Ages: 9 & up

Mascot Madness! Author: Andy Griffiths Ages: 9 & up

Robot Riot! Author: Andy Griffiths Ages: 9 & up

Girls' Life Ultimate Guide to Surviving Middle School Author: Scholastic Ages: 10-15

A Fabumouse School Adventure Author: Geronimo Stilton Ages: 9 & up