Word Seek HD

Price: 99 cents
Grade Recommendation: 3rd and up
Subject: Language Arts
Specific Skill: Spelling, vocabulary
Levels: 1
Players: 1 - 2
For iPad, iPod, or Both: Both (called Word Seek Social for iPod)

Please note that this game is tied to Apple's Game Center. One person can play without signing in, but that needs to be done if two people play against each other (via the 'Challenge' option on the main menu). (I assume you have to sign in to the Game Center for the iPod Touch version.)

This app is quite appropriately titled - users seek for words amongst given letters. The letters can either be arranged in a 4x4 or 5x5 array. When users find a word, they drag the letters in order (horizontally, vertically, and/or diagonally) and release to 'make' it. The letters do not change at all during the course of a game. Each found word earns points based on the letters it's comprised of. Besides customizing the board size, users can also select a 3, 4, or 5 minute time limit or get rid of the time constraint altogether.

After each game, the app displays your total score and your personal best. But it also displays the number and percent of words found out of the total that were possible for that game. It also displays the lengthy list of all possible words.