Cardcaptors is an anime TV show dubbed from Cardcaptor Sakura (the Japanese TV series originated from Cardcaptor Sakura, the manga). Although Cardcaptor Sakura may be more popular or more liked, I have only watched one episode whilst I have watched almost all episodes of Cardcaptors.
This story follows the adventures of a ten-year-old fourth grader that uses magic to capture Clow Cards. Each card contains a magical power (Power, Fight, etc.). While going through her basement, Sakura Kinomoto finds a mysterious book. Miraculously, Sakura opens this book and out floats Kero, a "stuffed animal" that could talk.
Unfortunately, several (a lot) of cards came shooting out of the book, too. The only one card that remained was "The Windy" card. With the help of this card and Kero, Sakura has to capture all other cards that had escaped the book.
On her adventures, Sakura also meets up with Li Showron (Li Syaroan), Meilin Rae (Meiling Li), and other mysterious teachers. With the help of these people, Sakura eventually manages to capture all the cards back, but then an even greater challenge awaits her.