What If? Can you use a magnifying glass and moonlight to light a fire?
Sun is about 400,000 times brighter than Moon. One can use a lens to concentrate light of sun and light a fire. Can you use a much larger lens and light a fire using moonlight?
Explain kids the Spot it! game (home made version used here with 57 cards and 57 symbols) and let them play the game, and make observations
Version 2: Give each kid a front card of their own to match the center card - do they always find a match, or are they stuck sometimes?
Create our own deck - 2 symbols on each card
Let kids create their own deck with two symbols on each card
See if they get to "infinite solution"
Why is this uninteresting? Lets define interesting as cases where there are at least two different matching symbols overall
How many cards should an interesting solution have?
How many symbols do we need?
Create our own deck - 3 symbols on each card
Let kids create their own deck with three symbols per card
How many symbols and how many cards do we need?
Is there a method to do this?
Is there a way to arrange these in a logical fashion?
Create our own deck - 4 symbols on each card
How many symbols and how many cards do we need? Is there a pattern to this?
Is there a method? Is there a way to arrange these in a logical fashion?
Does the method work for 5 symbols per card?
Can we now arrange the full Spot it deck into a logical structure, so that it is easy to find all cards for any given symbol?
How would you construct the full Spot it deck. 8 symbols per card
How many cards would be there (57)
How many total symbols would you use (57)
How many times would each symbol appear (8)
Match 3: Turn up 9 cards face up. If you can find 3 cards with same symbol, call it out and you can take the three cards and replace with three new cards. Do you get stuck sometimes? Why/ Why not?
Spot it Tic-tac-toe: Can you take 9 cards from the deck and arrange them into a tic-tac-toe so that all eight lines share a symbol across all three cards on the line?
Number of symbols on each card
The fact that there is exactly one symbol match from one card to next
How many symbols can be there?
How many cards can be there?
Homework
Create your own real deck of Spot it! at home (you could use numbers, or stickers)
Solve for the 5 symbols per card case by shuffling stuff around