Maturation is a process fraught with insecurity and angst, and Sabrina (Melissa Joan Hart) is experiencing all the normal teenage emotions while simultaneously trying to hide her powers as a witch, and fit in at a normal high school.  Imagine her surprise when, on her 17th birthday, Sabrina discovers that on top of her already packed schedule she must somehow find time to study for a test to earn her witch's license.  What's worse, her Quizmaster (Alimi Ballard) from the other realm can be counted upon to throw a pop quiz whenever Sabrina least expects it.  From mandatory enrollment in witch boot camp to working on the school parade float with her snooty nemesis Libby (Jenna Leigh Green) and joining her class on a field trip to Disneyworld, Sabrina's 17th year yields lots of important lessons about taking responsibility for her actions, nurturing a compassion for others, overcoming jealousy, and identifying the truly important things in her life.  Luckily Sabrina's Aunts Hilda (Caroline Rhea) and Zelda (Beth Broderick), talking cat Salem (Nick Bakay), boyfriend Harvey (Nate Richert), and new friend Valerie (Lindsay Sloane) can be counted upon to lend their support and help Sabrina through even the most stressful days.  A huge cast of guest stars throughout the 26-episode season include John Ratzenberger as Santa and Johnny Mathis as himself in "Sabrina Claus," Patrick Thomas O'Brien as Cupid in "The Equalizer," and a performance by 10,000 Maniacs in "A River of Candy Corn Runs Through It."  (Ages 8 and older)--Tami Horiuchi