I've seen that as well. And sun, cloud, thunder. And traffic lights. And...
TES language filters don't allow my to post what I think.
You need to find your own way and do your own thing. You will make mistakes. Sometimes through lack of experience, sometimes because you didn't think things through and sometimes because you are human and you will stuff up. This will happen every year throughout your career, so don't ever feel bad because of it.
As for sweets...bit of bribery can keep you sane on a cold, wet Thursday afternoon in November. But is it a right and proper thing to teach children that food is a reward????? Probably not ideal from a PSHE point of view and might go against your school's healthy eating policy.
If you feel the need for sweets, then plan a lesson which involves using them and then save waste by letting the kids eat the sweets! Perfectly acceptable then!

It's easier in year 3 than in KS1 or in Year 5/6, just because they are a more amenable age and yet old enough to know the rules and why. Mentors can undermine without meaning to...I've occasionally done it with BM and instantly regretted it. Mentors make mistakes as well.
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