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Remote Ready Biology Learning Activities has 50 remote-ready activities, which work for either your classroom or remote teaching.
ANSWER
the strategy is goog because you theorically get to touch every door, and have 2/3 of chance of getting money if you switch. Because if you are wrong you are already wrong, but switching may make you right. you have 33%, then 50% and if you switch another 50%... So basically you use all you possibilities and get more chance.