The purpose of this prospecitve randomized controlled trial is to compare effectiveness and patient/family adherence of weekly or daily Vitamin D-3 dosing regimens in children with Inflammatory Bowel Disease (IBD) who are 25-hydroxyvitamin D [25(OH)D] insufficient or deficient. The primary aim of this pilot study is to evaluate the effectiveness of once weekly verses daily D-3 dosing regimens based on the most current IBD supplementation guidelines in improving 25(OH)D levels. A seconary aim is to determine if there is difference in adherence between dosing regimns.