This is a no prep, ready-to-use bundle. They can be printed as packets or individual sheets. There are 4 packets which cover adding and subtracting within 1,000, 2-step word problems, telling time, and using arrays to solve multiplication problems. These extension packets should be used in addition to regular class curriculum or as a review for past concepts. They are great for unit closers as well! They can be used for teacher led, partner, or independent learning. In my class, these keep students engaged and excited for the lesson.