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 - think - wonder questioning. What do you see? What do you think? What does it make you wonder? Volume, analysis, collaboration, estimation ... MP1, MP2, MP3

How did I graph this heart? - What equations helped me draw this Valentine's heart? 8.EE, 8.F, HSA, HSG

Holiday candy sales - Which holidays are associated with candy? For which of those holidays is the most candy sold? What percents of annual candy sales does each holiday contribute? 6.RP.3 , 7.RP.3 7.EE.3

Sweetheart candies - NECCO went bankrupt in 2018 and there weren't Sweetheart candies the next year. But they are back now and made in Ohio instead of Massachusetts. How many dollars worth of sweetheart candies used to be sold each Valentine's season? Students practice problem solving, critical thinking, and number sense reasoning? 6.RP, 7.RP, N-Q

Where have all the flowers ~~gone~~ come from? - Sunday, February 14, 2021, is Valentine's Day. Start the "love hoopla" with this graphic (from visual.ly) about where all of those flowers come from. What fraction of these roses are shaded red? The red ones symbolize flowers that come from Columbia or Ecuador. What fact is this graphic of roses demonstrating? What other ways could they have shown that fact? 4.OA, 4.NF, 5.NF, 6.RP.3, 7.RP

Chocolate heart-shaped raspberry cake - Students build a heart cake and use ratio information to find the quantities of cake and icing resulting from increased. Students calculate base area or volume of cakes made from 2 cake pan sizes and observe how the volume of the cake changes with the increased pan size. This is an activity intended to demonstrate that the volume increase is not linear. 7.G.B, 7.RP.A, 7.EE.B, 8.G.C.9, HSG.GMD, HSG.MG, HSN.Q, HSA

A parametric heart ... with love - Students use unit triangles and manually calculate sine and cosine of π/2, π, 3π/2, and 2π as they try to graph this great-looking, curvy heart using parametric equations. We also have them create it using Excel, on a graphing calculator and with online graphing tools. HSG.SRT, HSF.

Which Sweet Heart candies are the best deal? - Students decide which quantity of Sweet Heart candies is the best deal. Ratio tables, unit ratios, devising convincing arguments. 6.RP.2, 6.RP.3, 7.RP.2

The size of chocolates - In this activity students approximate the volume of chocolate candy by finding surface area and approximating depth with grids and the mean radius method. 3.MD.5, 3.MD.6, 6.G.1, 7.G.4, 7.G.6

Valentine Cardioid - Four ways to construct cardiods for Valentine's Day ... polar graphing, a point on a circle revolving around another circle, calculator graphing ... HSN.CN.B

A gorgeous glittery heart - Students use different methods to figure out the area of this heart and how many sequins are required to fill it and make a spectacular card. 3.MD.C, 4.NBT.B, 5.NBT.B, 6.G.A, 7.G.A