4 pages. Making a mustache/moustache to launch a writing prompt, is an interesting and "Suessical" way of doing things. I think your students will enjoy it.
9 pages. Common Core State Standard: RL.1.2 Everything you need to review the elements of a story, as well as helping students to sequence and retell it.
2 pages. A fun way to review skip counting by 10's. A nice plug-in for your Seuss-themed activities.
20 pages. Common Core State Standards: RF.K.1d, L.K.1a, L.1.1a You'll find a nice variety of interesting ways to review upper and lowercase letters, including games, worksheets, and assessments.
4 pages. Having a "Cat in the Hat, hat stacking" contest is a great way to motivate students to read.
5 pages. Use this Seuss-inspired Lucky Ducky Writing Prompt poster, as a jump start for making a class book or March Is Reading Month bulletin board.
3 pages. Common Core State Standard: 1.MD.3 A fun game for your Seuss-themed activities. Students make their analog cat clock and add digital time stripes to their hat by rolling dice.