I have a few friends who are starting to study Koine Greek in seminary this semester. I decided to put together a study group for them in part because I think it will help me develop my skills in the language if I spend some time explaining it and rehashing the terms for myself. The textbook they are using is Basics of Biblical Greek Grammar (Grand Rapids, MI: Zondervan, 2009) by William D. Mounce. I thought it would be good to purchase a different textbook in order to get another perspective so I bought Fundamentals of New Testament Greek by Stanley E. Porter, et al. I’ve heard some good things about it.
What other grammars or resources do you think could be useful for supplementing the learning of this group?