Discuss estimation strategies. Volunteers measure an area of up to ten seeds and determine total count. Each student estimates total seeds and records answer on round self-sticking labels. Draw a number line from one to five hundred. Label line at intervals of fifty.
Affix labels with estimations on line plot above corresponding numbers.
For duplicates, place second label above first estimate. Volunteers remove seeds from sunflower head and use calculators to count them. Compare total seed count with estimates. Student pairs observe natural growing pattern of seeds. Use an oak tag worksheet to make a sunflower model .