Each group needs:

• 1 infrared sensor, specifically, the Sharp GP2Y0A02YK0F IR package for $14.50 at Acroname http://www.acroname.com/robotics/parts/R144-GP2Y0A02YK.html (includes an infrared sensor, JST 3-pin connector and three pre-crimped wires; this infrared sensor takes a continuous distance reading and returns a corresponding analog voltage with a range of 20 to 150 cm [7.87 to 59.05 in])
• 4 AA battery holder with cover and switch, such as item #W32971 for $1.95 at Pitsco http://www.pitsco.com/store/detail.aspx?ID=5163
• 3 AA alkaline batteries, such as item #W51046, two batteries for $2.93 at Pitsco
• 2 plastic wire-connectors, such as item #53213, 25 for $2.69, at Lowes
• 2 4-40 x ¾" Hillman combo round-head standard machine screws with nuts, such as item #62045, 12 for $1.18 at Lowes http://www.lowes.com/pd_62045-37672-491276_0__?productId=3036646
• 2-inches of 18 AWG shield wire, such as item #W12741, a 55-foot spool for $5.95, at Pitsco http://www.pitsco.com/18-Gauge_Stranded_Wire?SKU=W12741&tp=1
• 2 alligator clips, such as item #44564, two-pack for $1.96 at Lowes
• ~3 inches of electrical tape (or, give each team a roll so teams do not have to wait for tape), such as item #19456, 10-roll pack for $4.97 at Lowes
• precision screwdriver set, for assembling the sensor modules, such as item #W944S, a Performance Tool 6-piece screwdriver set for $2.49 from O'Reilly Auto Parts at http://www.oreillyauto.com/site/c/detail/PFM0/W944S/N0762.oap?ck=Search_N0762_PFM_-1_-1&mn=Performance+Tool&mc=PFM&pt=N0762&ppt=C0185
• mini multimeter, such as item #W31912 for $23.95 (includes 9V battery, test leads and probe) at Pitsco http://www.pitsco.com/store/default.aspx?KeyWords=W31912
• digital protractor, such as item #79017 for $24.98 at Lowes http://www.lowes.com/pd_79017-56005-1702_0__?Ntt=79017
• 25-foot metric and SAE tape measure, such as item #317494 for $10.98 at Lowes
• 1 toy airplane, such as a balsa wood glider, item #W50364 with a 12-inch wingspan for $3.95 at Pitsco http://www.pitsco.com/store/detail.aspx?KeyWords=W50364&ID=2706&c=&t=&l
• 3 balloon sticks with cups or 3 wooden craft sticks, to support toy airplane, such as Knextion balloon sticks with (cone-shaped) cups, 12 for $12.59 from Amazon at http://www.amazon.com/MULTICOLOR-BALLOON-STICKS-WITH-DOZEN/dp/B007BDDKJ2/ref=sr_1_4/183-7964811-0362554?ie=UTF8&qid=1381260627&sr=8-4&keywords=balloon+sticks+and+cups
• foam core board, such as 20 x 30-in x 3/16-in thick polystyrene core board, 10-pack for $31.03 at Walmart
• modeling clay (one-pound package), to use as desired, perhaps to secure the stick holding the airplane, such as item #W37660 for $3.50 at Pitsco
• 5 zip ties, such as item #292689, 500-pack of 8-inch nylon cable ties for $14.84 at Lowes
• 4 rubber bands, such as item #W33567, 2300 size #16 rubber bands for $5.95 at Walmart
• 4 3-oz plastic cups, such as 100-pack for $8.16 at Walmart
• gallon-size plastic zip lock bag, to contain materials needed to assemble and calibrate the sensor
• classroom object such as a box, book or the wall, to help in calibrating the sensor by measuring the distance between the sensor and the object
• Assembling the Sensor Handout
• Calibrating the Infrared Range Sensor Worksheet
• The Invisible Radar Triangle Worksheet
• The Invisible Radar Triangle-Scale Model Rubric
• The Invisible Radar Triangle Quiz, one per student
• notebook (or lined paper), for documenting design plans, one per student
• TI-84 graphing calculator

To share with the entire class:

• computer and projector to show a PowerPoint® file, The Invisible Radar Triangle Presentation
• Phillips screwdriver, for assembling the sensor
• electric drill with 9/64 drill bit, for assembling the sensor
• wire strippers, for assembling the sensor
• white glue, for students to use as desired, perhaps to assemble the airplane or glue plastic cups together to look like a radar system
• fishing line, such as a 225-yd roll of 25-lb clear monofilament fishing line for $3.10 by Eagle Claw at http://www.shopping.com/eagle-claw-monofilament/UOyxnMMhSVvCreIwNuuEDQ==/info?sb=1
• clear scotch tape, to tape down the tape measure