The kids loved watching bean seeds sprout. We put five beans in a ziploc bag with a folded wet paper towel. The bags were taped to our classroom window (with names written in permanent marker). Of course we also read "Jack and the Beanstalk"
Jack and the Beanstalk Activity: Build a Castle in the Clouds
Class Messages. This one is for Measurement. You could write messages and sign them from different characters/animals to fit your weekly theme/story...Brown Bear, Pete the Cat, Little Quack, Goldilocks, etc.