A leader of the National Science Teachers Association responded with three lies and no cogent criticism. Here are the lies:
First, it is a platitude that scientists disagree about climate change and its causes. The booklet gives chapter and verse on that.
Second the booklet is not 'propaganda labelled as science'. In fact it is a reasoned counterstroke to exactly that phenomenon, a phenomenon which often proceeds by omission and by hyperbole to make the case for panic over CO2.
Third, teachers have been docile vehicles for state propaganda for generations. The socialists in Germany for example, regarded them as no obstacle at all in their promotion of the Third Reich, and they have been no less a pushover when it came to one eco-scare after another in recent decades.
Jo Nova has more on this sorry rejoinder from the NSTA: http://joannenova.com.au/2017/04/us-science-teachers-say-trash-books-and-watch-leo-instead/
In particular she notes that the NSTA report no errors in the Heartland booklet, and that is why they resorted to a squeeling distortion of reality as their response.
I hope most readers will download the booklet and pass it on to all the teachers they know.
Note added later. I see from the Heartland site that they plan to send