Can you create a strong bridge out of these seemingly weak materials?
Design engineering is a great way to teach kids problem solving, teamwork, materials and tool use and the design process in general. In this activity, your students will also learn about structures and strong shapes used in structural design.
Gather all materials, separating equal amounts of the washers or pennies for each team.
Set the context by asking kids about bridges they’ve seen before. What are bridges used for? What kinds of things do they help us get across? What kinds of things cross bridges (cars, bicycles, people, etc.)? What do they think makes bridges strong? If possible, show them some pictures of bridges, or even better, take them on a walk to a bridge that is nearby. You could also ask a couple of volunteers to draw on chart paper a bridge they’ve seen before.
Tell your students that you’d like them to be bridge engineers and create a bridge using just 5 sheets of recycled paper and a small amount of masking tape. Their bridge will need to cross over 8.5 inches of “water” (a gap of 8.5 inches between 2 books or boxes), it cannot touch the “water”, and it cannot be attached to the “river banks” (the books or boxes). The 8.5 inches will be easiest to measure if you place a standard-sized piece of paper in between the 2 books or boxes, as these pieces of paper measure 8.5 inches wide. The students can color this paper to look more like water. Testing the strength of the bridge will be done by placing the coffee can or take-out container on the bridge and adding weight until the bridge collapses.
Once each team has created and tested at least one bridge, bring them together to discuss their findings. Have each team share what they’ve tried so far and what their results have been. This discussion should last no more than 10 minutes.
Send your students back to their bridges and have them create a new design or refine their old one based on what they learned from the discussion with the other teams.
SESSION 2
A few days after trying the bridges activity, introduce a new challenge:
I love engineering activities and this one is pretty easy to do since the materials are easy.
We tried pennies but they were too light, so we used water bottles filled with different amounts of water for weight.
Great idea, Dina...those small 1/2 liter water bottles filled with water are great as weights, and easy to get! If you have a scale handy (a small mail scale or kitchen scale is perfect), you can weigh and mark the bottles with precise weights.
watches
watches
new style watches
omega watches
breitling watches
Hermes Watches, Unisex Watches
language:
#navTool ul{ float:left;}
#navTool ul li{float:left;}





Replica WacthesA. Lange & Söhne Horloges
Replica A. Lange & Söhne Horloges
nep A. Lange & Söhne Horloges
kopie A. Lange & Söhne Horloges
A. Lange & Söhne Horloges
Replica Wacthes
A. Lange & Söhne Horloges
Replica A. Lange & Söhne Horloges
nep A. Lange & Söhne Horloges
Breguet Classique Collection Horloges : TITLE, SITE_TAGLINE language:
Swiss Replica Watches Inloggen of registreren
Uw winkelwagen is nog leeg














Christian Louboutin laarzen | Christian Louboutin schoenen | goedkope louboutin boots | Christian Louboutin laarzen | christian louboutin
Christian Louboutin Ankle Boots Madame Butterfly Booty 150 Beige [Ankle Boots-127] - €114.97
language:
inloggen
of registreren
Free Shipping + 24/7/365 Customer Service + No Sale Tax
Uw winkelwagen is nog leeg
US Dollar
CNY
Euro
GB Pound
Canadian Dollar
Australian Dollar
Jappen Yen
Norske Krone
Swedish Krone
Danish Krone
Russian Ruble
Valuta :
€1,342.57 €114.97
Juwelen
Tiffany sieraden
Goedkope Tiffany sieradenTiffany sieradenTiffany sieraden te koop
Tiffany sieraden | Juwelen | Tiffany sieraden | Goedkope Tiffany sieraden | Tiffany sieraden
Tiffany sieraden | Juwelen | Tiffany sieraden | Goedkope Tiffany sieraden | Tiffany sieraden
Tiffany Armbanden
Armbanden
Goedkope Tiffany Armbanden
Koop Tiffany Armbanden
Korting Tiffany Armbanden
Baby blog
Baby
About tiffanyor.com blog
Christian Louboutin Ankle Boots | Christian Louboutin Ankle Boots | Christian Louboutin Ankle Boots Sale | Goedkope Christian Louboutin Ankle Boots | Christian Louboutin Outlet
Christian Louboutin Pompen Maggie Chain-Toe Lavendel [Christian Louboutin Pumps-12] - €101.15
language:
inloggen
of registreren
Free Shipping + 24/7/365 Customer Service + No Sale Tax
Uw winkelwagen is nog leeg
US Dollar
CNY
Euro
GB Pound
Canadian Dollar
Australian Dollar
Jappen Yen
Norske Krone
Swedish Krone
Danish Krone
Russian Ruble
Valuta :
€1,298.91 €101.15
Juwelen
Tiffany sieraden
Goedkope Tiffany sieraden
Tiffany sieradenTiffany sieraden te koop
























inloggen
of registreren
Free Shipping + 24/7/365 Customer Service + No Sale Tax
Uw winkelwagen is nog leeg
US Dollar
CNY
Euro
GB Pound
Canadian Dollar
Australian Dollar
Jappen Yen
Norske Krone
Swedish Krone
Danish Krone
Russian Ruble
Valuta :
€1,298.91 €101.15
Christian Louboutin hakkenGoedkope Louboutin Schoenen
Discount Christian Louboutin OnlineChristian Louboutin Pompen
Louboutin Sale
Louboutin Sale
Christian Louboutin hakken
Goedkope Louboutin Schoenen
Discount Christian Louboutin Online
Christian Louboutin Pompen
Goedkope Louboutin Mary Janes, Korting Louboutin Mary Janes, Goedkope Christian Louboutin Mary Janes, Korting Christian Louboutin Mary Janes language:












US Dollar
CNY
Euro
GB Pound
Canadian Dollar
Australian Dollar
Jappen Yen
Norske Krone
Swedish Krone
Danish Krone
Russian Ruble
Meld je aan
of
registreren
Tiffany & Co Afgestudeerd Bead Drop Hanger€124.16 €24.01
Tiffany HART TAG Ketting€116.39 €29.10
Rainbow Drops Twee stenen Ketting€95.29 €22.03
Paloma `s Zellige Hanger€124.16 €21.83
Ronde Hook oorringen€83.04 €26.70
Red Heart Lock Charme en armband€193.92 €24.70




























horlogesnieuwe stijl horloges
omega horlogesBreitling horloges
Dior horloges
Dior horloges
horloges
nieuwe stijl horloges
omega horloges
Breitling horloges
Breitling horloges language:
#navTool ul{ float:left;} #navTool ul li{float:left;}












[b][url=http://www.christianlouboutincompany.com/christian-louboutin-sandals-c-1.html]Christian Louboutin Shoes[/url][/b]
[b][url=http://www.christianlouboutincompany.com/christian-louboutin-pumps-c-2.html]ChrChristian Louboutin Shoes
Christian Louboutin Pumps
Christian Louboutin Pumps On Sale
Christian Louboutin Pumps Knockoffs
Christian Louboutin Pumps cheap
[b][url=http://www.christianlouboutincompany.com/fr/christian-louboutin-sandales-c-1.html]Christian Louboutin sandales[/url][/b][b]
[b][url=http://www.brightreplicawatches.com/a-lange-sohne-watches-c-567.html]cheap A. Lange & Sohne watches[/url][/b]
[b][url=http://www.brightreplicawatches.com/armani-watcheap A. Lange & Sohne watches
Armani Watches
Replica Armani Watches
fake Armani Watches
cheap Armani Watches
[b][url=http://www.christianlouboutincompany.com/fr/christian-louboutin-sandales-c-1.html]Christian Louboutin sandales[/url][/b][b][url=http://www.christianlouboutincompany.com/fr/christian-louboutin-sandales-c-1.ht
Christian Louboutin sandalesSandals Christian Louboutin Sale
Sandales Louboutin
Pas cher sandales Christian LouboutinSandales Louboutin Discount
[b][url=http://www.brightreplicawatches.com/a-lange-sohne-watches-c-567.html]cheap A. Lange & Sohne watches[/url][/b]
[b][url=http://www.brightreplicawatches.com/armani-watcheap A. Lange & Sohne watches
Armani Watches
Replica Armani Watches
fake Armani Watches
cheap Armani Watches
[b][url=http://www.christianlouboutincompany.com/fr/christian-louboutin-sandales-c-1.html]Christian Louboutin sandales[/url][/b]
[b][url=http://www.christianlouboutincompany.com/fr/christian-louboutin-sandales-c-1.htmChristian Louboutin sandales
Sandals Christian Louboutin SaleSandales Louboutin
Pas cher sandales Christian LouboutinSandales Louboutin Discount
[b][url=http://www.christianlouboutincompany.com/fr/christian-louboutin-sandales-c-1.html]Chaussures Christian Louboutin[/url][/b] [b]
[b][url=http://www.christianlouboutincompany.com/fr/christian-louboutin-sandales-c-1.html]Christian Louboutin sandales[/url][/b][b]
[b][url=http://www.christianlouboutincompany.com/fr/christian-louboutin-sandales-c-1.html]Chaussures Christian Louboutin[/url][/b]
[b][url=http://www.christianlouboutincompany.com/fr/christian-louboutin-c-2.htmChaussures Christian Louboutin
Christian Louboutin Pompes
Pompes Christian Louboutin en vente
Christian Louboutin Pompes Knockoffs
Christian Louboutin Pompes pas cher
[b][url=http://www.christianlouboutincompany.com/fr/christian-louboutin-sandales-c-1.html]Christian Louboutin sandales[/url][/b][b][url=http://www.christianlouboutincompany.com/fr/christian-louboutin-sandales-c-1.ht
Christian Louboutin sandalesSandals Christian Louboutin Sale
Sandales LouboutinPas cher sandales Christian LouboutinSandales Louboutin Discount
[b][url=http://www.christianlouboutincompany.com/christian-louboutin-sandals-c-1.html]Christian Louboutin Shoes[/url][/b] [b]
[b][url=http://www.christianlouboutincompany.com/it/christian-louboutin-sandals-c-1.html]Christian Louboutin Sandali[/url][/b][b][url=http://www.christianlouboutincompany.com/it/christian-louboutin-sandals-c-1.htm
Christian Louboutin SandaliChristian Louboutin Sandali Vendita
Louboutin Sandali
Economici Sandali Christian Louboutin
Sconto Louboutin Sandali
[b][url=http://www.brightreplicawatches.com/a-lange-sohne-watches-c-567.html]A. Lange & Sohne watches[/url][/b] | [b][url=http://www.brightreplicawatches.com/]Replica Wacthes[/url][/b] | [b][url=http://www.brightreplicawatches.com/a-lange-sohne-watches-c-567.html]A. Lange & Sohne watches[/url][/b] | [b][url=http://www.brightreplicawatches.com/a-langeA. Lange & Sohne watches | Replica Wacthes | A. Lange & Sohne watches | Replica A. Lange & Sohne watches | fake A. Lange & Sohne watches
cheap A. Lange & Sohne watches
Armani Watches
Replica Armani Watches
fake Armani Watches
cheap Armani Watches
[b][url=http://www.christianlouboutincompany.com/it/christian-louboutin-sandals-c-1.html]Christian Louboutin Sandali[/url][/b][b][url=http://www.christianlouboutincompany.com/it/christian-louboutin-sandals-c-1.htmlChristian Louboutin SandaliChristian Louboutin Sandali Vendita
Louboutin SandaliEconomici Sandali Christian LouboutinSconto Louboutin Sandali
[b]copy A. Lange & Sohne watches[/b]
[b]Replica Wacthes[/b]
[b][url=http://www.brightreplicawatches.com/a-lange-sohne-watches-c-567.html]A. Lange & Sohne watches[/url][/b]
[b][url=http://www.brightreplicawatches.com/a-lcopy A. Lange & Sohne watches
Replica Wacthes
A. Lange & Sohne watches
Replica A. Lange & Sohne watches
fake A. Lange & Sohne watches
cheap A. Lange & Sohne watches
Armani Watches
Replica Armani Watches
fake Armani Watches
cheap Armani Watches
[b][url=http://www.christianlouboutincompany.com/it/christian-louboutin-sandals-c-1.html]Christian Louboutin Sandali[/url][/b][b][url=http://www.christianlouboutincompany.com/it/christian-louboutin-sandals-c-1.htm
Christian Louboutin SandaliChristian Louboutin Sandali VenditaLouboutin SandaliEconomici Sandali Christian Louboutin
Sconto Louboutin Sandali
[b][url=http://www.brightreplicawatches.com/a-lange-sohne-watches-c-567.html]fake A. Lange & Sohne watches[/url][/b] | [b][url=http://www.brightreplicawatches.com/]Replica Wacthes[/url][/b] | [b]A. Lange & Sohne watches[/b] | [b][url=http://www.brightreplicawatches.com/a-lafake A. Lange & Sohne watches | Replica Wacthes | A. Lange & Sohne watches | Replica A. Lange & Sohne watches | fake A. Lange & Sohne watches
cheap A. Lange & Sohne watches
Armani Watches
Replica Armani Watches
fake Armani Watches
cheap Armani Watches
[b][url=http://www.christianlouboutincompany.com/it/christian-louboutin-sandals-c-1.html]Christian Louboutin Sandali[/url][/b][b][url=http://www.christianlouboutincompany.com/it/christian-louboutin-sandals-c-1.htm
Christian Louboutin SandaliChristian Louboutin Sandali VenditaLouboutin SandaliEconomici Sandali Christian Louboutin
Sconto Louboutin Sandali
[b]Christian Louboutin Sandali[/b]
[b][url=http://www.christianlouboutincompany.com/it/christian-louboutin-sandals-c-1.h
Christian Louboutin Sandali
Christian Louboutin Sandali Vendita
Louboutin Sandali
Economici Sandali Christian Louboutin
Sconto Louboutin Sandali
[b][url=http://www.brightreplicawatches.com/]Replica Wacthes[/url][/b]
[b][url=http://www.brightreplicawatches.com/]Replica Wacthes[/url][/b]
[b]A. Lange & Sohne watches[/b]
[b][url=http://www.brightreplicawatches.com/a-lange-sohne-watches-c-567.html]ReplReplica Wacthes
Replica Wacthes
A. Lange & Sohne watches
Replica A. Lange & Sohne watches
fake A. Lange & Sohne watches
cheap A. Lange & Sohne watches
Armani Watches
Replica Armani Watches
fake Armani Watches
cheap Armani Watches
[b][url=http://www.havechristianlouboutin.com/christian-louboutin-boots-c-1222.html]Cheap Louboutin Boots[/url][/b] | [b]louboutin pump[/b] | [b][url=http://www.havechristianlouboutin.com/]louboutin pump discount[/url][/b] | [b]discount louboutin pumpsCheap Louboutin Boots | louboutin pump | louboutin pump discount | discount louboutin pumps | discount louboutin pump
Discount Louboutin Boots
Cheap Christian Louboutin Boots
Discount Christian Louboutin Boots
christian louboutin shoes
discount louboutin shoes
[b][url=http://www.havechristianlouboutin.com/nl/]Louboutin pompen korting[/url][/b][b]
[b][url=http://www.havechristianlouboutin.com/nl/]korting louboutin pomp[/url][/b]
[b][url=http://www.havechristianlouboutin.com/nl/christian-louboutin-boots-c-1222.html]Goedkope Louboutin Boots[/ukorting louboutin pomp
Goedkope Louboutin Boots
Korting Louboutin Boots
Goedkope Christian Louboutin Boots
Korting Christian Louboutin Boots
[b][url=http://www.havechristianlouboutin.com/nl/]korting louboutin pomp[/url][/b]
[b][url=http://www.havechristianlouboutin.com/nl/christian-louboutin-boots-c-1222.html]Goedkope Louboutin Boots[/korting louboutin pomp
Goedkope Louboutin Boots
Korting Louboutin Boots
Goedkope Christian Louboutin Boots
Korting Christian Louboutin Boots
[b][url=http://www.havechristianlouboutin.com/nl/]Louboutin pompen korting[/url][/b]
[b][url=http://www.havechristianlouboutin.com/nl/]
Louboutin pompen korting
Louboutin pompenlouboutin pomplouboutin pompen korting
korting louboutin pompen
[b][url=http://www.havechristianlouboutin.com/nl/]korting louboutin pomp[/url][/b]
[b][url=http://www.havechristianlouboutin.com/nl/christian-louboutin-boots-c-1222.html]Goedkope Louboutin Boots[/korting louboutin pomp
Goedkope Louboutin Boots
Korting Louboutin Boots
Goedkope Christian Louboutin Boots
Korting Christian Louboutin Boots
[b]cheap A. Lange & Sohne watches[/b] [b]
[b][url=http://www.linkreplicawatches.com/fr/bell-ross-watches-c-19.html]Réplique Bell & Ross montres[/url][/b]
[b][url=http://www.linkreplicawatches.com/fr/bell-ross-watches-c-19.htmlRéplique Bell & Ross montres
Bell & Ross montres
Bell & Ross Replica montres
acheter montres Bell & Ross
pas cher Bell & Ross montres
[b][url=http://www.louboutinbuying.com/fr/bottes-bottines-louboutin-christian-c-1375.html]Bottes Christian Louboutin cheville[/url][/b]
[b][url=http://www.louboutinbuying.com/fr/bottes-bottines-louboutin-christian-c-1375
Bottes Christian Louboutin cheville
Christian Louboutin Bottes
Christian Louboutin cheville Bottes VentePas cher Christian Louboutin BottinesChristian Louboutin Bottes
[b][url=http://www.linkreplicawatches.com/fr/bell-ross-watches-c-19.html]Réplique Bell & Ross montres[/url][/b]
[b][url=http://www.linkreplicawatches.com/fr/bell-ross-watches-c-19.htmRéplique Bell & Ross montres
Bell & Ross montres
Bell & Ross Replica montres
acheter montres Bell & Ross
pas cher Bell & Ross montres
[b][url=http://www.linkreplicawatches.com/fr/]Replica Watches[/url][/b][b][url=http://www.linkreplicawatches.com/fr/]Rolex réplique
Replica WatchesRolex répliques de montresMontres réplique B.R.M
Replica Cartier Montresréplique HUBLOT watchs
[b][url=http://www.brightreplicawatches.com/a-lange-sohne-watches-c-567.html]cheap A. Lange & Sohne watches[/url][/b]
[b][url=http://www.brightreplicawatches.com/armani-watccheap A. Lange & Sohne watches
Armani Watches
Replica Armani Watches
fake Armani Watches
cheap Armani Watches
[b][url=http://www.louboutinbuying.com/fr/bottes-bottines-louboutin-christian-c-1375.html]Bottes Christian Louboutin cheville[/url][/b][b][url=http://www.louboutinbuying.com/fr/bottes-bottines-louboutin-christian-c-1375.
Bottes Christian Louboutin chevilleChristian Louboutin BottesChristian Louboutin cheville Bottes VentePas cher Christian Louboutin BottinesChristian Louboutin Bottes
[b][url=http://www.linkreplicawatches.com/fr/bell-ross-watches-c-19.html]Réplique Bell & Ross montres[/url][/b]
[b][url=http://www.linkreplicawatches.com/fr/bell-ross-watches-c-19.htRéplique Bell & Ross montres
Bell & Ross montres
Bell & Ross Replica montres
acheter montres Bell & Ross
pas cher Bell & Ross montres
[b]Replica Watches[/b][b][url=http://www.linkreplicawatches.com/fr/]Rolex répliqu
Replica WatchesRolex répliques de montres
Montres réplique B.R.M
Replica Cartier Montres
réplique HUBLOT watchs
[b][url=http://www.linkreplicawatches.com/]Rolex replica watches[/url][/b] | [b]Replica Watches[/b] | [b][url=http://www.linkreplicawatches.com/]Rolex replica watches[/url][/b] | [b][url=http://www.linkreplicawatches.com/]replica B.R.M WRolex replica watches | Replica Watches | Rolex replica watches | replica B.R.M Watches | Replica Cartier Watches
Replica ORIS WATCHES
fake ORIS WATCHES
cheap ORIS WATCHES
copy ORIS WATCHES
ORIS WATCHES sale
[b][url=http://www.louboutinbuying.com/es/christian-louboutin-botines-c-1375.html]Christian Louboutin Botas de tobillo[/url][/b][b][url=http://www.louboutinbuying.com/es/christian-louboutin-botines-c-1375.htChristian Louboutin Botas de tobilloChristian Louboutin Boots
Christian Louboutin Boots baratos tobillo
Christian Louboutin OutletChristian Louboutin Boots
[b][url=http://www.christianlouboutincompany.com/es/sandalias-christian-louboutin-c-1.html]Christian Louboutin Shoes[/url][/b]
[b][url=http://www.christianlouboutincompany.com/es/christian-louboutin-bombas-c-2.html]ChChristian Louboutin Shoes
Christian Louboutin Pumps
Christian Louboutin Bombas En Venta
Christian Louboutin Bombas Knockoffs
Christian Louboutin Bombas baratos
[b][url=http://www.christianlouboutincompany.com/es/sandalias-christian-louboutin-c-1.html]Christian Louboutin Sandalias[/url][/b]
[b][url=http://www.christianlouboutincompany.com/es/sandalias-christian-louboutin-c-1.htChristian Louboutin Sandalias
Christian Louboutin Sandalias
Louboutin SandalsVuelos Sandals Christian Louboutin
Sandalias de Louboutin de descuento
[b][url=http://www.linkreplicawatches.com/]Rolex replica watches[/url][/b]
[b][url=http://www.linkreplicawatches.com/]Replica Watches[/url][/b]
[b][url=http://www.linkreplicawatches.com/]Rolex replica watches[/url][/b]
[b][url=http://www.linkreplicawatches.com/]replica B.R.M WatchesRolex replica watches
Replica Watches
Rolex replica watches
replica B.R.M Watches
Replica Cartier Watches
Replica ORIS WATCHES
fake ORIS WATCHES
cheap ORIS WATCHES
copy ORIS WATCHES
ORIS WATCHES sale
[b][url=http://www.louboutinbuying.com/es/christian-louboutin-botines-c-1375.html]Christian Louboutin Botas de tobillo[/url][/b][b][url=http://www.louboutinbuying.com/es/christian-louboutin-botines-c-1375.Christian Louboutin Botas de tobilloChristian Louboutin BootsChristian Louboutin Boots baratos tobilloChristian Louboutin OutletChristian Louboutin Boots
[b][url=http://www.louboutinbuying.com/es/christian-louboutin-botines-c-1375.html]Christian Louboutin Botas de tobillo[/url][/b][b][url=http://www.louboutinbuying.com/es/christian-louboutin-botines-c-1375.html]Christian Louboutin Botas de tobillo[/url][/b][b][url=http://www.louboutinbuying.com/es/christian-louboutin-botines-c-1375.html]Christian Louboutin Boots[/url][/b][b][url=http://www.louboutinbuying.c
[b]Christian Louboutin Sandalias[/b]
[b][url=http://www.christianlouboutincompany.com/es/sandalias-christian-louboutin-c-1.hChristian Louboutin Sandalias
Christian Louboutin SandaliasLouboutin Sandals
Vuelos Sandals Christian Louboutin
Sandalias de Louboutin de descuento
[b]Replica Watches[/b]
[b][url=http://www.linkreplicawatches.com/]Replica Watches[/url][/b]
[b][url=http://www.linkreplicawatches.com/]Rolex replica watches[/url][/b]
[b][url=http://www.linkreplicawatches.com/]replica B.R.M Watches[Replica Watches
Replica Watches
Rolex replica watches
replica B.R.M Watches
Replica Cartier Watches
Replica ORIS WATCHES
fake ORIS WATCHES
cheap ORIS WATCHES
copy ORIS WATCHES
ORIS WATCHES sale
[b][url=http://www.christianlouboutincompany.com/es/sandalias-christian-louboutin-c-1.html]Christian Louboutin Sandalias[/url][/b]
[b][url=http://www.christianlouboutincompany.com/es/sandalias-christian-louboutin-c-1.htmChristian Louboutin Sandalias
Christian Louboutin Sandalias
Louboutin Sandals
Vuelos Sandals Christian LouboutinSandalias de Louboutin de descuento
leave a comment