Rather than assessing your unit on American Imperialism through your traditional test, try this "Dinner Menu" of activity choices that includes a rubric (100 points) and necessary templates. Students must complete the "appetizer" activity, choose and complete two of the "side dishes" and one of the "entrees". For advanced students, a "dessert" is available. The assessment is distributed in a "menu" format that includes all options, requirements, and the rubric itself.
Though we use this menu after teaching American involvement in Hawaii, Alaska, Japan, China, Panama, & Cuba/PuertoRico/Philippines, the menu is adaptable enough to be appropriate for whatever territories you include in your imperialism unit.