ONE DOLLAR WORDS CHALLENGE Set 7: the most challenging individual set. 90 advanced vocabulary puzzles, grades 3–6, no prep enrichment. Math Meets Literacy | Critical Thinking | Enrichment | Gifted Education The most challenging individual set in the series — for students who are truly ready to dig deep. Set 7 brings 90 one dollar word puzzles at the highest difficulty level of any individual set. Clues are sophisticated, vocabulary demands are at their most rigorous, and students who have wor