This page provides classroom activities and projects ideas for
Unit 3.
When students answer openended questions in writing, they learn to express mathematical ideas in written form. Expressing mathematical ideas in written form is a valuable skill. It also provides teachers with an assessment of students' mathematical thinking. Furthermore, standardized math tests often call for written explanations. Have students answer several openended questions using full sentences.
The activity below can be used as an informal assessment tool. It can also be transformed into an interdisciplinary project: The math teacher can grade students based on the mathematical correctness of their responses. The Language Arts or English teacher can grade them on spelling and grammar. Some sample questions are provided below.

Math Project 1:  Find all twin primes and mirror primes less than 100. 
Math Project 2:  Why do we say "three squared" and "five cubed"? Research the connection between exponents and geometric units of measure. 
Interdisciplinary Project: Math and Science 
The math teacher can teach students about exponential notation. Once students become proficient with this topic, they can apply their knowledge to topics in science. For example, they can do research to find the distance between the sun and each planet, and then write each distance using scientific notation. Advanced students can learn about negative exponents. They can then look at the halflife of certain radioactive elements and at the size of bacteria and viruses. 
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