Hi Mary, I hope you are well. Our Helpline volunteers are always willing to review the research that other Master Gardener volunteers have conducted. 

For example, there are a number of resources that pop up when you search "moss in lawns" in the Extension search tool you learned about in class: https://extension.org/search_gcse/

This one might be particularly useful -- https://extension.psu.edu/moss-in-the-lawn -- and I'd also recommend reviewing Chapter 11 in your EMG manual. Give those a review and if you have lingering questions, type back in and we'll follow up. Thanks.