-Be sure to include already selected library books and a text book as additional resources to the web.
Giving students choice is important, they are the investigators, we are the facilitators.
-Make sure this doesn't seem overwhelming, take it one task at a time so that the students stay engaged. Setting aside an allocated time period each day could be beneficial. Working over a period of time will allow students to spend more time on each individual task.
-Feel free to adapt... it is known that, each class and student are individual.