Lesson Plan Day 4-5
Specific Learning Objectives
Materials
Elaborate
Students will create a hot pack that
will be the ideal temperature.
Teacher asks/says/does:
Student asks/sa
Students will discover the best ratio of Calcium Chloride to water that produces a t
45°C-55°C. (the ideal temperature for hot packs).
calcium chloride
water
measuring scoop (mL)
thermometer
graduated cylinder
test tube
Super Structured Option
This option minimally satisfies the NGSS standard
but it works well for teachers who are not
comfortable with student groups working on
different activities at the same time.
Today you will investigate the best ratio of
calcium chloride to water that produces a
temperature between 45°-55°C (the ideal
temperature for hot packs).
For your hypothesis, decide what ratio of calcium
chloride to water will be the best. Choose a ratio
(1:10, 1:5, 3:10, 2:5, 1:2)
Students write down their hy
Remember our safety rules with calcium chloride.
You must wear safety goggles the entire class
period. Do not touch, taste, or eat any of the lab
materials.
Students should put on their
Carefully read the procedure and decide how to
set up your data table.
1.
2.
3.
4.
Add 10mL of water to the test tube
Carefully add 1 mL of calcium chloride
to the test tube. Stir briefly. Be sure to
keep your stirring consistent throughout
the lab. (i.e. always stir three times)
Wait until the temp. stops rising and
record that temp.
Add another 1mL of calcium chloride
and record the maximum temp.
Repeat step 3 until the temp. reaches
more than 55°C
As you record your data, make observations.
Write the ideal calcium chloride to water ratio.
Describe how you would design a hot pack based
on what you learned from the lab.
Less Structured Option
This option satisfies the NGSS standard but can be
more chaotic as groups have much more freedom
to choose what they want to do.
Students should write an app
Amount of Calcium Chloride
Temperature). The independ
Calcium Chloride (mL) and t
variable is temperature (°C)
You need to design a hot pack using calcium
chloride and water. Your goal is that it stays at
the ideal temperature (45°-55° C) for as long as
possible.
Student answers will vary.
Once you design your hot pack, you must perform
a controlled experiment to test its effectiveness.
Then you will analyze your results, make
modifications to your design, and test it one more
time.
All experiments must be approved by me before
you start. I will supply calcium chloride, water,
Ziploc bags, aluminum foil, Styrofoam cups, and
paper towels. If you need any other supplies, ask
me or bring them from home. You might want to
experiment to find the best ratio of calcium
chloride first and then focus on the design of your
device.
Science Process Skills used:
How is student participation ensured?
Lesson Plan (Homework)
Specific Learning Objectives
Materials
Evaluate
Students will complete a formal lab
write-up about their hot-pack
experiment
Performing an experiment
Designing an experiment
Designing and modifying a device
 Divide the tasks for the activity so that each group member has a specific
 Walk around while they are working to ensure their participation .
Teacher asks/says/does:
Student asks/sa
Students will analysis their data from the lab in a formal lab repo
Hot Pack Lab Report instructions and rubric
Graph paper
NOTE: This is aligned with the super-structured
option. If you use the less structured option, you
might want to adjust the instructions.
NOTE:I have done this as a homework assignment
with my Accelerated classes. It is their second
formal lab report for the year. I usually give the
students 1-2 weeks to complete it. With nonaccelerated classes you would need to spend class
time scaffolding.
Read the “Hot Pack Lab Report” instructions and
discuss the rubric.
Science Process Skills used:
How is student participation ensured?
Analyzing
Drawing conclusions


Scaffold as necessary and give help to ensure all students can complete
Schedule computer lab time so students can type their report