Among other things, her daughters were not allowed to watch TV, play computer games, host/go on play dates or sleepovers, appear in school plays, get any grade less than an A, not be the no. 1 student in any subject except drama and gym, choose their extracurricular activities, play any musical instrument aside from the piano or violin, or refrain from playing either of those instruments.
On one occasion, she called one of her daughters "garbage." On another, Chua rejected a handmade card one of her daughters made her for Mother's Day on the grounds that it wasn't good enough. On still another, she threatened to burn her daughter's stuffed toys if she could not master a piano piece, and made her practice it dozens of times into the night, refusing to even allow her to go to the bathroom. That sounds ghastly, but hey, at least she didn't beat her daughter to death with a pipe for mispronouncing a word.