Explore geometry and measurement concepts! Three packs cover Measurement (Ordering Lengths), Shapes (2D & 3D Identification), and Partition Shapes (Halves & Quarters). 15 worksheets with colorful shape graphics and visual length comparisons. 240+ problems with answer keys. Common Core aligned. Search terms: 1st grade math worksheets, 2D and 3D shapes, partition shapes into halves and quarters, measurement comparing lengths, answer key, printable geometry PDF.