Answer:
Society believed that women needed only the ability to read, write, and do simple math.
In early 1800's, women were considered to be second class citizens and their interests were restricted to home and they were not encouraged or supported enough to get education and pursue a career.
Therefore, the society believed that women only needed education which was enough to read, write and do simple math since they were only supposed to do the household chores and look after the kids.