Mo was pronounced MOO. Can you imagine  if  I were to say  someone speaks broken English? I'd be called racist!

English as a Second Language (ESL) adult classes are helpful. but even with them, many still speak broken English.

I remember in grades 1-2, written on flip chart paper masking-taped to the walls, with a pointer our teacher drilled with us THROUGHOUT the day:
 cat, hat, mat, etc. then  cake, bake, make.  

In my elementary school (1960s in Thunder Bay) everyone could read. We all had to read aloud to the class or in small groups until grade 8! If you had a problem we had a buddy system or a student from a higher grade was assigned to help.

Guess it was the influence of our wonderful Italian principal (today, he'd be called a visionary leader) and his experience growing up with parents who spoke "broken English" likely he remembered his challenges & importance literacy. My school had approx  20% immigrants parents who made the best food,  but struggled with their English.