Classify

Run each creature down a branching yes/no key into the right kingdom and class — then try building a key of your own.

How to play

In Sort mode you place each organism into a group by answering the key's yes/no questions about its traits. In Build mode you become the taxonomist: author an ordered list of yes/no rules that correctly separates every creature into its group. Get them all right to clear the round.

• Each branch tests one trait — follow it down to a leaf group
• Use hints sparingly; they cost points
• In Build mode, rules are checked top to bottom with a final catch-all group

Controls

• Desktop: click a creature then click its group, or click to add rules and predicates
• Phone & tablet: tap to select and place — every control is touch-friendly

Game modes

• Sort: classify creatures using the given key
• Build a Key: design your own working classification
• Daily or Practice, across Easy/Medium/Hard difficulty

Tips & strategy

• Start with the broadest trait that splits the group most evenly
• Watch for edge creatures that share traits with two branches
• In Build mode, order rules from most general to most specific

What you'll learn

Classify is a taxonomy puzzle that teaches dichotomous keys and biological classification, training the logic of sorting living things.

• Skills: taxonomy, classification, dichotomous keys, observation
• Best for: roughly grades 5–10 (ages 10–16)
• For parents & teachers: practical practice with the keys scientists actually use.

About Classify

Classify is an original taxonomy puzzle that teaches dichotomous keys and biological classification. It's free to play in your browser with nothing to install.

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