Khan Academy
Khan Academy: Multiply by 3
Multiply 3 times a number less than or equal to 10. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints. CCSS.Math.Content.3.OA.C.7 Fluently multiply and divide within 100
University of Cambridge
University of Cambridge: Nrich: Skip Counting
Follow the clues Froggie gives you to help her skip count her way to the pumpkin patch. There are several solutions and you can check yours against the solutions right at this one page website.