DH has been qualified for 2 years now as a primary teacher. He's done supply ever since qualifying, none of the work has been suitable towards his NQT as he's always been with different schools and classes. Never anything longterm.
He gets enough work most of the time and many of the schools request him back as they like him and trust him to do a good job. Always gets good feed back.
He's applied for countless jobs over the last 2 years. Had quite a few interviews but never successful. Usual reasons are someone else was more qualified, his lesson wasn't perfect enough, lack of experience showed in the interview for things like assessment. He's an NQT so of course others will be more qualified and he doesn't get to do things like assessment as a supply teacher. After the last interview he had he was so deflated.
I'm at my wits end with it, we need the stability of a permanent income and plus he is stagnating being stuck as a supply teacher when he's still an NQT. Every time we talk about it, it becomes an arguement. He gets upset as feels like a failure 
Any advice on how he can improve his interviews etc greatly appreciated. I think he's starting to feel like giving up. It would be such a shame as I genuinely think he is a good teacher 