Odd World is a simple, solar system-themed game that can help students begin to understand basic concepts of probability and chance. Each attractive square card has two planets on one side and only one of the two on the other side. The object of the game is to score points by acquiring odd numbers of all nine planets (Pluto is counted as a planet but the explanation of its re-classification as a dwarf planet is included in the instructions). Players take turns picking from the top of the pile that has the two planet side facing up. The player decides, based on the 50-50 odds, of keeping the card for himself or giving it to another player. When one player has acquired all nine planets the game is over, but players only earn points for the planets for which they have an odd number of cards. For example three Neptune cards will earn you three points, but four Jupiter cards will earn you zero points. Players then tally up their points and the player with the most points wins the game. Players implicitly begin to understand the concept of 50-50 chance and the probability of someone acquiring all nine planets and ending the game. However, the game feels slow-paced and because there is such a high element of chance many students might not find it very compelling.

• Provides sufficient and varied types of practice problems to maximize understanding and generalization of the targeted skill/concept
• Manufacturer claims alignment with Common Core/Known Standards
• Presents educational concepts accurately
• Explains answers so students can learn from mistakes
• Better for teaching the skill to new or struggling learners
• Better for practicing or refreshing the skill
• Skills are practiced through authentic, meaningful problems (not just rote practice)

• Appropriate for a broad age range to use and enjoy
• Visually appealing to children in the target age range
• Adults would enjoy playing with a child
• For electronic games, gives positive or encouraging feedback
• Offers ongoing, progressive challenge
• Overall - Enjoyable. Given the option, students would choose this option

• Provides teaching guidance for adults to support the child and set appropriate goals
• Student should be able to use independently after first use
• Student graduates to the next level or topic only after meeting a benchmark
• Can effectively understand and monitor student's progress (email report or in product)
• Does not require excessive set-up time after first time use
• Can be fun as a single player game
• Multi-player game which fosters collaboration or cooperation
• Well-made for the cost
• For electronic games, can play without sound
• For electronic games, allows user to save work
• For electronic games, voice/sounds are appealing and pronounces words properly
• Provides options to play in languages other than English/Good for ELL
• Presents information in multiple formats (voice over, pictures and text, etc.)
• Overall - Easy to use

• Attention
• Problems or examples are not interesting for the target age range

Odd World immerses players in a game universe where collecting the most planets is the path to victory. There is however one condition, only an odd number of each of the known planets will count towards victory. To win, players take calculated risks, watch their opponents' game and attempt to cunningly disrupt it all the while trying to preserve their own gains. Remain on guard as tumbling from what seems as a sure winning position to a losing one can happen with the flip of a card! Remember, it's an Odd World, can you master it?