A complete Common Core aligned nonfiction science, math, and literacy unit. December and January are wonderful times to study evergreens. There are activities that span all three grade levels. Skills include: writing, math, science, experiments, vocabulary, grammar, handwriting in both D'Nealian and cursive, and oral language skills. Your students will think like botanists at the end of this unit. Great for home "schoolers" as well. If you like fully integrated teaching, this unit is "tree"mendous.