Place Value Cups. Use the cups to understand place value practice counting forward and backward learn the names of large numbers decompose numbers to expanded form. I would either label the cups 'ones' 'tens' etc. or add a comma cup or decimal point cup
Use an old tire to create a small backyard pond. My kids, 3 sons, have been helping with yard work and planting. They keep asking for a pond. I think this is a great DIY project to do outside with them. Looks simple.
This could be adapted to suit my class! (via Team V’s First Grade Fun: “I’m Done” Cups) Students pick a stick from the “I’m Done” cup and work on an activity when they are finished with their work. Teachers can range the activities depending on the grade.