Two crossword puzzles on the periodic table of elements. One for grades 3-6 with some help, grades 7-9 without help, depending on the learner. And one for high school. Can be used with The Periodic Table of Elements Coloring Book but not necessary. Encourages the learner to use clues, the periodic table, knowledge of how the table works (high school), critical thinking and counting letters in the words, all to solve the puzzle. Perfect for an easy day, travel, school days before holidays, or bus