Lesson: Dictionaries of Lists

Learning Objectives

Students will be able to...

• Create dictionaries with keys of different types and values of different types
• Update list values in a dictionary

Materials/Preparation

• Do Now
• Lab
• Associated Reading - section 5.3 of Book
• Read through the Do Now, lesson, and lab so that you are familiar with the requirements and can assist students

Pacing Guide

Instructor's Notes

1. Do Now
   • Display the Do Now on the board
2. Lesson
   • Ask the students about part 1 of Do Now
     • What type is list_dictionaries. It is still a dictionary type which goes from string to list. Dictionaries can also go from numbers to lists or numbers to strings any combination.
   • Asks students about part 2 of the Do Now.
     • How do you update a value within a dictionary. Have to first get the item. If it doesn't exist set it to empty. If it does exist append a value to the end.
     • Have students practice adding and removing values from a dictionary that goes from strings to lists.
3. Lab
   • Students will create a weekly to do list. The user can add items to the to do list.
4. Debrief
   • Talk about any confusion the students had.
   • Talk about how in works for dictionaries for the bonus