The Worst Witch at School (by Jill Murphy)

Mildred Hubble is excited about her first year of witch school, but soon discovers the lessons to be more challenging than expected -- making mistakes and getting into trouble seem to come easier to her than making the grade. But when she find out that rogue witches are plotting against the school, Mildred may just manage to save the day.

Mildred Hubble is your average, awkward, school-age kid who has adventures with her friends, but also faces challenges. Kids will find her a relatable character right away (with the added fun that she's a witch), and will enjoy her unique friends Maud and Enid. Maud wears glasses, is short and stocky, and tends to play it safe. Enid is tall and big-boned, also awkward, and likes mischief.

First published in 1974 when the author was just 18 years old, it's since been adapted as a movie and TV series. It makes a great read-alone or read-aloud for pre-Potter kids, and not just because it will remind them of the bestsellers. The author's great characters and worthwhile lessons are ideal for this age group.