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There are 48 sheets and no required order. If you would rather not choose, here is a first thirty nights that mixes school math with new ideas and keeps the surprises coming. Each is ten to fifteen minutes; the starred problem is extra. Tick each night off.

The first thirty nights

1. Odd plus odd is always even
2. Ten times bigger, ten times smaller
3. The race to 21
4. The same fraction in disguise
5. Eleven ways to unfold a cube
6. Why long multiplication works
7. Which pack is the better buy?
8. Why you cannot add thirds to quarters
9. Everyone shakes hands
10. What lives between 0.3 and 0.4?
11. The number 6174
12. Half of a third
13. Find the fake coin
14. Counting cubes without counting
15. What time is it in Tokyo?
16. Square numbers and triangle numbers
17. What to do with the remainder
18. How many ways home?
19. How many halves are in three?
20. Fold a paper to the Moon
21. Treasure maps: coordinates
22. Who owns the fish?
23. A billion heartbeats
24. Where does the decimal point go?
25. Shapes that tile
26. What's my rule?
27. Every number's fingerprint
28. Is a square a rectangle?
29. Why A4 is the shape it is
30. Half, and half again

After night thirty, pick whatever looks interesting. The Connections sheets are good for tired evenings: more reading, less calculation. The demos are for screens, five minutes each.

Tick-off card

Every grade 5 sheet. Print this page, stick it somewhere visible, and tick them off. Finish a whole track and tell someone.