There will be some topics that your student understands quickly and some concepts that may take longer to master. The big ideas of the course take time to learn. This means that students are not necessarily expected to master a concept when it is first introduced. When a topic is first introduced in the textbook, there will be several practice problems to do. Succeeding lessons and homework assignments will continue to practice the concept or skill over weeks and months so that mastery will develop over time and long-term learning will occur.
If your student still needs extra practice on some topics, either current or previously learned, make sure that you go to the cpm.org website and look for Parent Guides and Extra Practice. You can select the current or past course and look at the table of contents to find the topics you need. You will also find the checkpoint problems there. They are also for review and practice of concepts.