1. 1. 1. Computer or other device with speakers + internet
      2. “Bucket Tower Challenge Data Table” worksheet
      3. “Tower Weight Multiplication Practice” worksheet
      4. Timer or clock
      5. A lot of newspapers (or other type of paper you may have)
      6. A lot of scotch tape (or other tape you have)
      7. String, yarn or thread (about 2 feet)
      8. 7 oz – 9 oz, paper or styrofoam cup
      9. A lot of marbles (or other small weighted objects such as coins, washers, pebbles, etc. The objects you use should all be the same size and weight)
      10. If you cannot print any of the worksheets, just write your answers on a piece of paper.

1. 1. 1. Practice multiplication of a multi-digit number by a single-digit number;
      2. Participate in a rapid prototyping process; and
      3. Build a free-standing tower that can hold a cup of marbles.

1. 1. 1. See examples of rapid prototyping for building a tower;
      2. Understand the process and benefits of rapid-prototyping;
      3. Use rapid-prototyping process to build a tower;
      4. Using newspapers, tape, string, and a cup, construct a tower that can hold the most weight; and
      5. Calculate the amount of weight your tower can hold.

CCSS.MATH.CONTENT.4.NBT.B.5
Multiply a whole number of up to four digits by a one-digit whole number, and multiply two two-digit numbers, using strategies based on place value and the properties of operations. Illustrate and explain the calculation by using equations, rectangular arrays, and/or area models.

ETS1.A: Defining Engineering Problems
Possible solutions to a problem are limited by available materials and resources (constraints). The success of a designed solution is determined by considering the desired features of a solution (criteria). Different proposals for solutions can be compared on the basis of how well each one meets the specified criteria for success or how well each takes the constraints into account.