10 min. - Hook - Whole group - Teacher will show students a real sample of each of the
products listed on the crop cards (corn, soybean, orange, avocado, cotton, etc.) and
have students name each of the products. Numbering each product and placing them in
a row is best for organizational purposes if students are unfamiliar with the item. Teacher
will then ask students: What do all the products have in common? Where do we get
these products from? Does it matter where and how these products are grown?
10 min. - Pair and share - Students will turn to their partner to discuss the questions for
several minutes. They will then share their answers and background knowledge of the
items with the class. Students should write any pertinent information in their journals.
15 min. - Small group - Students will work with a partner for the lab. They will receive
several soil samples from various places in the Chicago area. Students will wear goggles
while working with the soil samples. Students will place a small amount of each soil
sample in a separate plastic cup or test tube. They will add a small amount of distilled
water to the soil sample, enough to turn it to mud. After stirring the sample to mix
thoroughly, students will place a piece of Hydrion pH strip on top of the mud letting the
water soak into the pH strip. Students will compare the pH strip color to the color scale
provided and record their results in a chart. Students will discard pH strips and mud in
the garbage. Plastic cups/test tubes will be rinsed off.
25 min. - Small group - Students will receive a set of crop cards listing various plants and
their ideal growing conditions. They will also receive a growing fact sheet for the Chicago
area. After reviewing the crop cards, students will decide which crop(s) would be best
suited to grow in the Chicago-area based on the fact sheet and their collected data. They
must have evidence to support their decisions. If a student chooses a crop not suited for
this area, they must support their choice by arguing how they could make
accommodations for that crop to grow (fertilizer, greenhouse, adding soil supplements,
etc.). Students will write a conclusion for their findings.