Any guitar lesson should comprise of few of the most important tips to start playing guitar which are:-
How to hold the guitar as well as the pick
Method to learn the progression, chord names and finger placement
To learn the scale names, fingerings and intervals.
In some places they even teach you warm-ups and practice lessons which is also very essential thing in a guitar lesson. Some of them may misguide you by giving a list of your favorite songs to play but transcribed by not so good players. Check out for that. If you cultivate a good practice routine and follow the above mentioned tips then you can be rest assured that you are on the right track of guitar learning lessons.