Card sorts are an excellent way to provide students with focused practice that is not tedious. I love incorporating them into interactive notebooks.
Even though I assume that my middle school students understand number lines, I find that many of them still struggle with visualizing the locations of numbers on them (especially irrationals).
Eight sets of problems are included in this card sort. Each set consists of five rational and irrational numbers. Students will place each number at its proper location on the number line provided.
This is a a flexible activity. You may use some or all sets of problems. Use them as notes, in-class practice, homework, or as a quiz. Also, you may want to ask your students to identify each number as either rational or irrational as they complete the activity.