This is going to be another great week of events. Friday, April 22^{nd}, is both * Earth Day* and the beginning of

*.*

**Passover**The Blue Marble - Students compare maps with this famous photo and check to see which characteristics are maintained in each sort of mapping (Mercator, Goode homolosine, Gall–Peters, Winkel tripel) and which characteristics are distorted.

Start your class with a wonderful movie (produced by the Overview Institute) that shows the Earth as it was seen for the first time from space and the impact of that view.

Cost of light bulbs - Students learn more about LED and CFL light bulbs as they analyze and graph their energy use and costs of lights and appliances. Students use decimals operations, order of operations, graphing, systems and piecewise functions in this activity to help them think about ways to conserve the energy that they use.

- What's my angle? - We've used a little Solar geometry to analyze and estimate the proper angle for the tilt of my Solar panels.

*Friday evening, April 22 ^{nd} also marks the beginning of Passover.*

- Mom's Matzo ball soup - Passover begins with a Passover seder dinner. Passover is one of the three high holidays in the Jewish calendar and celebrates the Exodus of Jews from slavery in Egypt.Let your students review fractions in this investigation on tripling my mom's recipe and trying to use the recipe to create one humungus matzo ball.
- Passover Macaroons - Let your students review fractions in this investigation on halving and tripling the fractional quantities of ingredients in a Passover macaroon recipe. Choose whether you want students to consider what the general rule might be for increasing or decreasing this recipe.