Correct typo in tutorials.rst

tutorials.rst

@@ -206,7 +206,7 @@ A tutorial must inspire confidence. Confidence can only be built up layer by lay
 
     You are required to be present, but condemned to be absent. 
 
-A teacher who's there with the learner can rescue them when things go wrong. In a tutorial, you can't do that. Your tutorial ought to be so well constructed that things *can't* go wrong, that your tutorial works every user, every time.
+A teacher who's there with the learner can rescue them when things go wrong. In a tutorial, you can't do that. Your tutorial ought to be so well constructed that things *can't* go wrong, that your tutorial works for every user, every time.
 
 It's hard work to create a reliable experience, but that is what you must aspire to in creating a tutorial.
 
@@ -254,4 +254,4 @@ Meanwhile, the cooking lesson might be framed around the idea of learning how to
 
 The child learns all this by working alongside you in the kitchen; in its own time, at its own pace, **through the activities** you do together, and not from the things you say or show.
 
-With a young child, you will often find that the lesson suddenly has to end before you'd completed what you set out to do. This is normal and expected; children have short attention spans. But as long as the child managed to achieve something - however small - and enjoyed doing it, it will have laid down something in the construction of its technical expertise, that can be returned to and built upon next time.
+With a young child, you will often find that the lesson suddenly has to end before you'd completed what you set out to do. This is normal and expected; children have short attention spans. But as long as the child managed to achieve something - however small - and enjoyed doing it, it will have laid down something in the construction of its technical expertise, that can be returned to and built upon next time.