# Tag: 4.MD.A

## Vampire bats + Mosquito eating bats

Two activities. Vampire bats = We’ve given lots of interesting metric and customary unit facts and asked students to relate those sizes to more familiar objects. + Mosquito eating bats = Students compare a bat’s weight to how much he can consume in one night. They calculate how much they would need to eat to consume a comparable proportion of food.

## How hard is it to find a 4 leaf clover? (3 Saint Patrick’s Day activities)

We have 3 Saint Patrick’s Day activities for your math class. How hard is it to find 4-leafed clovers, the nutritional values of a Shamrock Shake, and measuring parts per million (ppm) of dyeing the Chicago River green.

## Need to rent some chaise lounges

Here’s the rental sign. How much will 6 lounges and 2 umbrellas cost?

## Ravensburger huge puzzle

Students surmise what the difficulty of a jig saw puzzle entails and use rate calculations to estimate finishing times. They try to confirm whether doubling the number of pieces really increases puzzle completion time by a multiple of four.

## More eruptions on Hawai’i’s Kilauea

The Volcano Kilauea is continuing to spew molten lava and ash on the island of Hawai’i. This volcano is on the tip of the southern most Hawaiian Island.  Is that significant? In this activity students note the descending ages of…

## BIG Snickers bar

Wow!  This snickers bar is huge! Act 1 – Big question = How many times bigger than a regular Snickers bar is this? What info would you like to know? How are you going to judge how much bigger this is…

## Civil rights marches, how do you count a crowd?

On October 16, 1995, perhaps a million black men gathered for the Million Man March on Washington.  This was 32 years after Martin Luther King, Jr. gave his historic “I have a dream” speech at the Lincoln Memorial to 250,000 civil…

## Which is the best deal?

How do you calculate and justify which deal is a better savings?  By dollars saved?  By percent saved? By some other measure? The activity: WhichDealOffersMostValue.pdf CCSS: 4.OA, 4.NBT, 4.MD.A, 5.NBT, 6.RP, 6.EE, 7.RP, 7.EE.A