A Danish market found an interesting way to limit hoarding of hand sanitizer.

- How much are these costs in your currency?
- What is the unit price on these bottles?
- By how much (what percent) was the price increased?
- Is this legal?

A Danish market found an interesting way to limit hoarding of hand sanitizer.

- How much are these costs in your currency?
- What is the unit price on these bottles?
- By how much (what percent) was the price increased?
- Is this legal?

**This day is known for pranks and puzzles. **

**Try one of these 4 activities on April Fools Day.**

Ask students to analyze where I made my mistake

For members we have solutions. PerplexingProblem-solution.pdf

CCSS: MP1, MP3, 4.OA, 5.G, 8.EE, 8.SP

Or baffle 'em with this **Ghost Whisperer lesson**. They will think you are pulling one over on them until they figure out the math!

CCSS: 4.OA.4, 5.OA.1, HSA.CED.A.2, MP1, MP3, MP4, MP7, MP8

Use our present need for cleanliness to engage your students.

Does it really matter whether you kill 99.9% of the bacteria or 99.999% of the germs?

In this 3-act activity we've asked students to consider whether these claims about these two wipes' efficacy really make a difference. We've supplied students with a list of bacteria counts on various surfaces and asked them to calculate how much of a difference these two different percents make in wiping out germs.

This is an excellent opportunity to deal with repeating decimals.