  We explore almost-normality in Isbell-Mr\'owka spaces and some related
concepts. We use forcing to provide an example of an almost-normal not normal
almost disjoint family, explore the concept of semi-normality in
Isbell-Mr\'owka spaces, define the concept of strongly $(\aleph_0, <\mathfrak
c)$-separated almost disjoint families and prove the generic existence of
completely separable strongly $(\aleph_0, <\mathfrak c)$-almost disjoint
families assuming $\mathfrak s=\mathfrak c$ and $\mathfrak b=\mathfrak c$. We
also provide an example of a Tychonoff almost-normal not normal pseudocompact
space which is not countably compact, answering a question from P. Szeptycki
and S. Garcia-Balan.
