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Chain 4, join.
1. Ch 3, 2 DC, CH 2, 3DC, CH 2, 3DC CH 2, 3DC, CH 1, SC in beginning CH 3. This will put you at the center of your chain space.
2. Ch 3, 2 DC, CH 2; 3DC, CH2, 3DC, CH2 in next space, repeat two more times. For last corner shell, CH 1 and SC join to beginning CH3.
3. Ch 3, 2 DC, CH 2; *3DC in next space, CH2; 3DC, CH2, 3DC,in next corner space. CH 2, repeat around from*. 3DC in last space. CH1 and SC join.
Basic Crochet Granny Square Video Tutorial:
Left Hand Crochet Granny Square