Here are 5 quick and easy practice activities for your math tubs or centers. Aligned with First Grade Common Core Standards, the five games practice the concepts of one more, one less, ten more, ten less and finally doubles plus 10. Each practice game contains 4 gameboards. All together that gives you 20 boards for practice. You can differentiate and have students practice the activities that they are currently having difficulty with, and then have them move on to another concept. Your students will love the wonderful graphics and will have fun practicing basic skills in this engaging format.