BBC offers the possibility of listening to a series of short texts on a wide range of topics.
The texts are about one minute long, that's the reason for the series name, and the script is included.
I think this can be a good starting point (prompt, warm-up) for some of your classes as many of the topics are part of the curriculum. Some examples are: trips, colours, relationships, food choices, shopping, phobias, honesty, new year resolutions... you name it.
The videos can be downloaded from the Express English site or be watched on line.
To access the Express English site click HERE
I have embedded some of the videos below with the link to the page where the script is, but please, browse around. There are more than 30 choices for you at the Express series site.
See these examples:Jealousy, Freedom and Fashion.
JEALOUSY: Download the scrip from the site HERE
When do you feel free? Download the script HERE
What's in fashion at the moment. Download the script HERE