One of the suggested lab experiences in the AP Biology classroom is the Floating Leaf Disk Assay or FLDA. In this lab, students investigate with the role of light intensity on the rate of photosynthesis.
This product is one that I have completely modified and expanded so that entry level college biology students can optimize their comprehension while also performing some authentic inquiry.
This lab includes a background, objectives, materials list, procedure, tips and tricks, photo images, data tables, graphs and analysis questions. Additionally, this product has a "Part Two" to accompany the College Boards suggestion of the FLDA...along with testing for light intensity, students will complete a second investigation testing an additional variable on the effect of photosynthesis rate.
The materials for this lab are very basic, and any classroom laboratory should have the required materials - in fact, it is written so that a student could in theory perform this lab on their own at home with basic household materials (I have actually had several students do just this when they've had extended classroom absences).
Additionally, this lab fits perfectly into a traditional 3 hour college lab block. If you are fortunate enough to have such a prolonged lab block at your school (or college), then this lab will fit nicely into the time. If you are like me, my school has roughly 1 hour classes (55 minutes) and this lab takes my students THREE class periods to complete.