Dress code for female teachers in Riyadh

I know that we need to wear an abaya but I would like to know whether the female teachers can take off the abaya at school.  Do you wear professional clothes underneath or smart casual? Are we allowed to wear pants?
Someone told me I must not bother taking any professional clothes. Any idea what sortof clothes to take with for work?

Teachers can take off the abaya or can keep it worn.But an overcoat is used as uniform.Overcoat should be worn over the dress like the doctors do.

depends from school to school.

Many schools ask teachers to wear a long black skirt and a white shirt, others ask for any colored long skirt and shirt so usually it's a long dark skirt and a light shirt.

Yes it is allowed. Inside the school you can wear it.