Hi
The scope is as good as you want it to be, give your best, HR rules, concepts, experience remains consistent with any organizations. Quality of your contribution in making the organization effective will decide the growth and scope of your Career..
On a practical note, today's times education is becoming privatized, so the market potential of education industry is being explored by big players in the market. Corporatization of Education is taking place in every nook and corner of the world. So expect good demand for HR professionals in this industry.
However, research the reputation and size of the educational organization you are joining.