Moodle might be a bit more popular than CubicSDR. We know about 1 link to it since March 2021 and only 1 link to CubicSDR. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
GQRX works pretty well for me. There is also CubicSDR and SDRAngel afaik - you might just want to play around with them and see which you are most comfortable with. Source: 12 months ago
Moodle can handle this but it might be overkill for your requirements. Once you have it setup though the quiz feature is really great, and the analytics it provides are awesome. Source: about 1 year ago
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