• estimating areas by counting number of squares on a grid mostly inside
• comparing the diameter and area of a circle
• lucky numbers

Marjorie Fields [Young Elementary School]
Static Electricity with paper and sugar

Shirley Cesair [Henderson School]
white glue and borax --> flubber peanut description; return to bog partner tries to identify.

Imara Abdullah [Douglas School]
ions in fruit

Sheila McKinnon [Sherman School]
origami: Japanese-inspired paper folding: elephant, pig, shark, airplane

Barbara Pawela [CPS retired - formerly at May School]
Physical and Chemical changes in various systems:

1. diet pepsi cans [froze&exploded--chemical] [Why did Diet Pepsi freeze before Sprite?]
2. microwave pastry [left in too long; exploded--chemical]
3. slicing an apple [physical]; apple surface then turns brown [chemical]
4. heating apple slice in a candle [chemical]
5. cooking raw egg in a skillet [chemical]
6. cutting paper [physical]; burning paper [chemical]
7. salt and water --> saltwater brine [chemical]
8. salt and pepper mixture [physical]
9. burning candle [chemical]
10. melting ice with candle [physical]
11. boiling water [physical]
12. soda and vinegar [chemical changes produces C0₂; caught in a balloon
13. hydrogen peroxide and yeast [chemical changes produces 0₂; caught in a balloon]

Nina Lilisa [Good Counsel HS]
Energy transfer: energy exists in bundles, and we can illustrate transfer of a bundle of energy by transferring a wad of paper.

• Radiation: paper wad thrown across the room from A to B
• Conduction: paper wad passed from hand to hand across room from A to B
• Convection: paper wad carried by person A over to B; A then gives it to B

Earnest Garrison [Chicago Vocational HS]
Pocket Sundial: it measures local solar time, and there is a correction to be made for the date. PJ comment: these sundials must be different at different latitudes on earth [Chicago is 42^o above the equator], and must go around the other way in the Southern Hemisphere. See the picture of an Antipodean Sundial in Christchurch, New Zealand: http://sunandshadows.net/canterbury.htm 

Estellvenia Sanders [Chicago Vocational HS]
Science and Signing [Part 10]:
In sign language you have the option of giving the "sign" or "spelling out" the letters, and the signs have many meanings. The signs are often related to common gestures [hand touching head and off = "forget"; "opening pop bottle and making a "pop" = "pop"; needle into arm = "drugs"; etc]. She reviewed these signs: coke, red, color, food, glass, visual, taste, lemon, paper/school, orange, yellow, clue/idea.

It was commented that deaf people are often good dancers, and they especially enjoy music very loud so that they can "feel" it.

Ben Butler [L Ward School]
Making a balance scale out of everyday materials:

• Sand in a plastic soda bottle
• file hanger beam
• pivot pin
• plant pot holder for pans
• string for support
• Nickels for 5 gram weights