(276–291): The final battle on the Sacred World of the Kai, followed by a 10-year time skip to the series finale.
Slice-of-life and comedy. Gohan in high school, Great Saiyaman persona. Tone shift after Cell. Some fans dislike it, but it’s important for Gohan’s character. Filler: Episode 196 (Gohan fights criminals) — fun. Episodes 202–204 (Videl learns flying) — good. Verdict: Not essential but charming. Watch 195–199, 210–219 (tournament starts). Skip if you only want fighting. list of dragon ball z episodes
If you want a specific episode-by-episode review for a smaller range (e.g., just the Frieza fight or Cell Games), let me know. (276–291): The final battle on the Sacred World