Grade 1 math worksheet: Measure ocean creatures using seashells as non-standard units.
A colorful educational worksheet for Grade 1 students titled "Measuring Lengths with Non-Standard Units of Measure," featuring five ocean-themed exercises where children measure various sea creatures using seashells as units. Each row includes a different sea animal (turtle, stingray, fish, dolphin, shark) and a row of seashells for measurement, with a blank box to record the answer. The worksheet includes a space for the student's name and a website link for additional learning resources.