TA-ship requirement for funded international applicants

As I have read from other questions in this SE site, for all international students who apply in PhD program, it is required that to be TA for that department they have applied to. And in the other hand amount of money that will be paid as fund to that student is highly depend on his/her progress on teaching and being TA.

So with regard to this context, I as a MSc. student with unfortunately severe stuttering, cannot be TA or teacher (only in such cases that I should speak to teach a group of students, however in any non-speaking ways to teaching or being TA I have no problem)

My questions:

1. Is speaking required in all types of TA-ship and teaching? in other words, is there any other works that considered as TA-ship and teaching that does not need for speaking/lecturing?


2. How much chance I have to get funded? (is there any exceptions for getting funded for such students?)

More context about me

• Currently MSc student (in Iran) and want to apply for PhD program to North America universities.


• Field of study/interests : computer science/software

My background/achievements

• BSc. and MSc. GPA > 18 out of 20


• Graduated from most prominent university in Iran, Sharif Univ. of Tech.