diff --git a/notes.md b/notes.md
index 67cc9f6..c757c76 100644
--- a/notes.md
+++ b/notes.md
@@ -7,12 +7,23 @@ For each, explain how the behavior is accomplished.
 
 ### Checking to see whether the game is over
 
+ttt.game.TTTGame
+It checks whether the board is full or if a player has won to determine if the game has ended.
+
 ### Determining which actions are available at a particular state
 
+ttt.game.TTTGame
+It returns the list of empty spaces for the player to place symbols on.
+
 ### Showing the board
 
+ttt.view.TTTView
+It prints the current board, showing the current available spaces.
+
 ### Choosing which action to play on a turn
 
+ttt.player.TTTHumanPlayer
+It prompts the player to choose which board space to place the corresponding symbol on.
 
 ## Checkpoint 2 Notes