How many triangles can you make with 9 sticks? Or older kids, Who can use these 9 sticks to make the most triangles? Kids can reinforce geometry and critical thinking skills through creating various shapes with sticks.
Trees study- From: I'm a teacher, get me OUTSIDE here! Sorting sticks from longest to shortest. Good outdoor group activity for preschoolers that can be left for individual students to return to time and again.
Have set up befor going on a nature walk! - I love math that is so visual. This link will open to an article on Kindergarten Math but so many of the activities can be adapted to younger students, like the leaf activity pictured here.