Use It! Don't Lose It! Daily Practice series helps your students use their skills, so they won’t lose them. There are five problems a day, every day for 36 weeks. The practice activities are set up in a spiraling scope and sequence so that students practice skills at regular intervals. Each week’s problems are based on a grade-level appropriate topic so every time a skill shows up, it has a new context requiring students to dig into their memories, recall what they know, and apply it to a new situation.