  We present our ongoing work on integral field spectroscopy of three
prototypical HII galaxies: IIZw70, IIZw71 and IZw18. The data are mainly used
to study the ionized gas and stellar clusters. Our main goal is to investigate
the presence of spatial variations in ionization structure indicators, physical
conditions and gaseous metal abundances, in these galaxies. Maps of the
relevant emission lines and a preliminary analysis of the ionization structure
are presented for IIZw70.
