Listen to students initial thoughts as they wrestle through what “bigger” means … length? height? wheel-base? volume? Come up with guesses that are too high and too low. Show that the average of guesses is pretty close to actual.

In this 3-act activity, students need to invent a different way to measure the powdered chocolate than what the instructions dictate. How many 1/4th teaspoonsfuls of powder = 2 teaspoons? How many 1/8th teaspoons = 2 teaspoons? General rule?

Updated! How much do we spend on Mother’s Day – Use the Mother’s Day event to engage your students in approximating, reasoning, and investigating as students estimate how much is spent in the United States for Mother’s Day. For what…

We have 16 activities that you could use for Earth Day! Saturday, April 22nd is Earth Day. Help your students become activists for our planet? We have 16 activities that support recycling, conserving resources, awareness of climate change and protecting our planet.…

Have a heart Canstruction – Students use reasoning and approximation to analyze the number of cans of food contained in this one giant heart. Consider starting out the activity by showing students the picture of the heart and doing a see…

We have tons (well, 16) of activities to bring to your class in this last week before the holiday break. Movies, science, art, cooking, economics, weather and the logic of calendars. Enjoy!

In this 3-act task, your class guesses how many feet of lights you will need to light your tree. Then gather data from groups and find means or medians. Then actually calculate an estimate given tree dimensions.

In this problem based activity students first guess and then try to calculate whether they will have enough paper to wrap this present without taping pieces of wrapping paper together. I have to wrap this box. ⇒ ⇐ …

14 Activities How well can you predict your candy haul? – Students consider how to determine their best predictions of their candy haul. The math ideas of measurement error and percent error are introduced. Students then predict their own Halloween…

Act 1 – Give students time to view the game board above or give them our one-page activity. The above picture is larger when you click on it. Ask students for their gut reaction about which slot would give them…

Students judge from apparent diameters and penny heights, which jar has the most money. Mrs. Mercado had 3 pictures of scales with two jars on each balance. That is another great puzzle.

In this 3-act activity, students learn about the story, watch a PowerPoint presentation about the issue, and try to calculate the amount of money in this pile. Copper pennies, zinc pennies, metric to standard conversions, and more.

How much snow is that? – How many inches of snow produced that pile? How much snow in volume is on top of the car? How much could that snow weigh? Approximation, snow/water equivalent rates (SWE) 5.MD.C, 6.RP.A, 7.RP.A, 7.EE.B, 7.G, 7.EE.A Snowy…