Reply to comment

For day 2, the students test the food items listed on page 5 of the Student Handout and the dry and liquid parts of Jerell’s evidence to complete the table on the bottom half of page 5 of the Student Handout.  To prepare the dry or solid evidence and the liquid evidence, consult the instructions on the top of page 2 of the Teacher Preparation Notes.  You can pick whichever worker you want to identify as the one who left the evidence.  For the dry or solid evidence, combine starch and protein for José’s lunch/snack or glucose and protein for Ashley's lunch/snack or glucose and starch for Bruce's lunch/snack or just starch for Kiara’s snack. Follow the instructions in the table to know whether to have the liquid evidence be oil or water. Then, have your students test the dry and liquid evidence samples for glucose, starch, protein and lipid.

You will notice that our Teacher Preparation Notes recommend having different evidence samples for different student groups to test, so different groups can't just assume they will get the same results as other groups.  However, if you prefer, it is fine to give all your groups the same dry and liquid evidence samples.

Please let me know if you have any additional questions,

Ingrid