These vocabulary activities and organizers allow students to really interact with words, explore them, be creative with them, and make them “their own”. Having students look up definitions from a long list of words and then expecting them to memorize the definitions - or worse yet, use the word in a meaningful (and context-correct) sentence is one of the worst mistakes a teacher can make.
Meaningful vocabulary acquisition requires that students have multiple, ample opportunities to interact with a word before it will become something they recall easily in reading or use correctly in writing and speech. These activities and organizers are designed to do just that. You’ll notice that most activities require more than just a definition. They require thought, decision-making, and creative analysis.