Give your students the opportunity to explore and practice place value with this fun, relevant research assignment! The task requires students to think critically about the most populated cities in the United States. They need to explain their reasoning by making connections to prior knowledge. Students then conduct research using an online database in order to find out the most populated US cities. The last portion of the activity requires students to practice their place value knowledge with activities that use the data from their research. Must know and understand place value to the ten millions! Can be used as an independent or cooperative activity.