Standards: 4.NF.4     3.NF.1

Act 1 

Watch the video:

Sweet Tart Hearts Revisited – Act 1 from Mike Wiernicki on Vimeo.

Ask students:

• What do you notice?
• What do you wonder?

Focus question(s):

• How many sweet tart hearts of each color?
• How many pink (or any other color) sweet tart hearts are in the glass?

Ask students to:

• Write down an estimate that is too high.
• Write down an estimate that is too low.
• Write down a best guess estimate.
• Mark each estimate on an empty number line.

Act 2

Ask students what information/tools they need to answer their question.  Give them their information as they ask for it.

sweet-tart-hearts-revisited-act-2

Allow students time to engage in productive struggle, solving their problem through sense making.

Act 3

• Share your solution and strategies.  Compare your strategies and results.
• How reasonable was your estimate?
• What might you do differently next time?

The Reveal:

Sweet Tart Hearts Revisited – Act 3 from Mike Wiernicki on Vimeo.