In contrast, an investment good is a good that we consume and derive "utility" from on multiple occasions over time; i.e., our home, our automobiles, even the latest laptop or iPhone -- we purchase the good today but it has a useful life of a few or even many years.
Education, and specifically higher education, has characteristics of being a consumption good and an investment good. When I decide to attend the local university, I am purchasing an investment good -- I am spending a lot of money. The education I receive over time will pay dividends and provide financial benefits to me for many years into the future.