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I didn't, it was a tip. The lesson plan that I wrote is thought for a 90min lesson or 2 lessons of 45 min.
I'm not a teacher and I don't know exactly if my lesson plan is suitable.
By the way for that mod you don't need big knowledge of electronics, you just need a booster (it turns 4.5v to 5v or more) and it's done. Batteries --> booster--> shield