Traditional books followed the pattern of: Class Features + Racial power + 2 At-Wills + 1 Encounter + 1 Daily.
Class features such as Combat Challenge, Healing Word, and Rapid Charge are quite easy to forget, especially as some aren't presented in power blocks.
Some Racial Powers: (Old Humans, Old Half-Elves) allow the granting of at-will or encounter power based on some other class. These have been changed in essentials to provide players who don't want a 3rd at will (Human) or an at-will from any other class (Half-Elf) more normal racial options.
The newer Essentials builds do not follow that framework. Most first level powers derive from class feature choices. However, these builds do a far superior job describing what power choices a character needs to make at every level within the class description.
There are also feats (Expanded Spellbook) that give you even more potential power choices for additional confusion.