You absolutely have to check out my newest FREE math application, compatible with all devices called The Amazing Number Chart!
With the Amazing Number Chart, you can make customized number charts with certain numbers or patterns of numbers missing for your students to fill in. You can make a series of number charts for your students to complete consecutively. Number Charts can be saved and deployed to students. When you save a chart or charts, you receive a special code that you'll need to share with your students. Students will enter this code into the program to access your number chart.
Please try this out and let me know what you think!!