```ruby
User.create(username: "admin", email: "admin@admin.com", password: "password")

category_array = ["History", "Science", "Math", "Foreign Language", "English", "Music", "Art", "PE/Health"]

category_array.each {|category| Category.create(category: category)}

grade_level_array = ["K-2", "3-5", "6-8", "9-12"]

grade_level_array.each {|level| GradeLevel.create(level: level)}
```

Add additional user to seed
user
```ruby
User.create(username: "admin", email: "admin@admin.com", password: "password")

category_array = ["History", "Science", "Math", "Foreign Language", "English", "Music", "Art", "PE/Health"]

category_array.each {|category| Category.create(category: category)}

grade_level_array = ["K-2", "3-5", "6-8", "9-12"]

grade_level_array.each {|level| GradeLevel.create(level: level)}

User.create(username: "kdmcclin", email: "kdmcclin@gmail.com", password: "thisisnotadrill")

user.lessons.create(title: "Introduction to Ancient Greece",
objective: "Students will be able to explain Ancient Greece’s geographic aspects and their implications for setting up a civilization.",
warmup: "Unit diagnostic in green pen",
main: "-Introduce Unit (go through library)\n-Video Clip 1 (Turn & Talk—What do you notice about Greece? e.g: mountains, ocean/water)\n-How do you think Greece was similar or different than the other ancient civilizations we have studied? Turn and Talk.\n-Video Clip 2 (Focus on the following questions on the board as you watch: What more do you notice about Greece’s geography? How are the Greeks different than other empires? Why was it important for the Greeks to become traders?\n-Share Out\n-Worksheet on Ancient Greece’s geography, together in groups.",
homework: "none")
```
assistant