Here are the correct forms of the words:

56. The film is a big **disappointment**. It is boring from beginning to end. (disappoint)

57. The Christmas season is also called the **festive** season. (festival)

58. He feels very tired after two continuous nights of **sleep**. (sleep)

59. My school will **widen** the playground at the beginning of next year. (wide)

60. Many **educators** and scholars discussed the change of the curricula. (educate)