Documenting your research from beginning to end may be the most important part of the process. The steps you took to conduct your research need to be able to be replicated.
You will also need to write a detailed methods section for your assignment - and keeping detailed track of what your group did at each stage will be crucial to ensure the methods are written out in their entirety. Think about if you picked up someone's paper and were trying to repeat what they did - you'd want as much detail as possible.
When keeping track of your searches, you want to ensure you are writing down the following pieces of information:
Often, databases will now have options for printing and/or saving search histories when you make an account. Take advantage of these to avoid a lot of manual tracking.