Planet 7 is different from all of the others: instead of having students work on words that follow certain spelling patterns, the words in this planet are arranged by topic. These are critical words for students to be able to spell: the basic numbers, colors, days, names of family relationships, parts of the body, school-specific terminology, and more. Although this planet might require fewer specific teacher-directed minilessons, we think it is a critical set of levels for students (of virtually all ages) to practice. These words show up in students' reading material and even likely in morning messages and schedule charts posted in your classroom, so it's imperative that students develop complete mastery of them as soon as possible.