Counting to 100: by ones and tens, hundred chart activities Looking for low-prep, engaging, and easy-to-use math resources for your students? Look no further! Our CCSS-Aligned Task Cards turn math practice into an exciting adventure. With answers conveniently placed on the back of each card, students can learn at their own pace while gaining immediate feedback. With answers conveniently placed on the back of each card, students can learn at their own pace while gaining immediate feedback. FILES