I generally don't have a lot of concrete memories from being that young but I remember super well the teacher who taught me how to read. We read the same book ( Nina Nina Ballerina ) so many times and at the end of it she let me have the book since it was originally her daughter's who was now much older. I could still tell you the whole story of that book and I didn't even realize until like high school that they didn't pull everybody aside to teach them how to read.
I wasn't a big reader after that anyways but learning how to read was still a memory I cherished. So I'm sure it tries your patience at times but you're probably giving children a memory they will cherish for a long time which is pretty cool.