Five engaging science units address fourth grade earth science standards for 30 states (NGSS and 10 others). Curriculum bundles include hands-on activities and projects; labs, stations, and experiments; STEM challenges; inquiry; and more. Posters/anchor charts, review, and assessment for fast and slow changes to Earth's surface are also included. The following states and Washington, D.C. have adopted Next Generation Science Standards (NGSS): Arkansas, California, Connecticut, Delaware, Hawaii, I