These games are best suited for a ratio of one teacher to six to ten pupils. If you are alone and have more than fifteen pupils you will find that the children will either become over-excited or will get bored waiting for their turn in many of the games, so you will have to work quite hard during the lesson. I would say that if you have more than twenty preschool children and you are the sole adult in the room during lessons then these games would not be suitable.
At this young age you need either smaller groups or more adult help. If you have an adult helper to the ratio of one adult to about 10 children then the games will be OK as you will be able to spend much of the time splitting the group. More.
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