Listing items where the last item has the word 'and' in it

Solution 1:

There are several ways of rephrasing or punctuating the sentence to avoid ambiguity.

Some possibilities include:

This term I am teaching two modules and they are Maths and Art and History.
This term I am teaching two modules and they are 'Maths' and 'Art and History'.
This term I am teaching two modules and they are Maths and Art & History.
This term I am teaching two modules and they are (1) Maths and (2) Art and History.
This term I am teaching two modules. One is Maths and the other is Art and History.
This term I am teaching a Maths module and an Art and History module.