HOUSTON --Veteran teacher and motivational speaker Harriett J. Ball, who helped inspire the KIPP charter school system, has died. She was 64. The KIPP Foundation tweeted news of Ball's death. The Houston Chronicle reported Saturday that Ball died Wednesday at a Houston hospital after suffering a heart attack. Ball taught for about 35 years in the Houston and Austin school districts before becoming a speaker, training thousands of teachers with her techniques. She used rhymes and rhythm to captivate young people. The KIPP (Knowledge is Power Program) charter chain includes 99 schools that serve about 27,000 children. The public schools help prepare low-income students for college. A wake and funeral are scheduled for Tuesday at Together We Stand Christian Church in Missouri City. Burial will be in Rosenberg.