Have you seen my previous posts with my daily math warm ups? I've shared K/1.
These units were created to be a supplemented to the curriculum you're already using. They're easily used for morning work or homework for spiral review. Some people choose to use them to jumpstart their math block or as an independent review at the end. I've even heard that people have placed them at centers. The format makes them pretty versatile. I especially like my third grade version because I was able to include every single standard.
I have a complete set that has 160 pages and will last you the entire year! I also have it broken down into 4 different smaller sets. Click on the pictures to check out a bit more information.