Math K-5
Math Outdoors
A comprehensive collection of 80+ outdoor maths ideas, activities and suggestions. They are open-ended and many work well with a range of ages and abilities. Most just rely on a few free and found resources. Check them out!
https://creativestarlearning.co.uk/c/maths-outdoors/
Language Arts K-5
Outdoor Learning Activities for Elementary
The spring and fall seasons are the perfect time to take your students out of the classroom for some outdoor learning activities. Your students will be more motivated to work before, during, and after the outdoor learning activity. Outdoor learning is also an excellent behavior motivator for when your students have spring or summer fever
https://teachingtoinspire.com/2017/04/outdoor-learning-activities-for-upper-elementary.html
Science K-5
Outdoor Science Activities for Kids
A variety of outdoor Science activities and experiments for students
https://littlebinsforlittlehands.com/outdoor-science-activities-kids/