Objective: Students
will be able to solve rate problems using the formulas d = rt, r = d/t, and t =
d/r and problems involving proportional mixtures.
Activity-Divide students into groups of 3 or 4. Have them take turns walking for
one minute and finding the distance they traveled. Then have them determine how
far they would walk in 10 minutes, 20 minutes, 30 minutes, 45 minutes, and 1
hour. Explain that they will need to write 1 hour as 60 minutes so the units of
time match in all calculations.
Activity-Pair off the students and have them measure a distance of 10 feet. Have
them time how long it takes each of them to hop that distance. Then have them
calculate how far they could hop in one second. Encourage them to use the
formula d = r times t.
Activity-Suggest that the students visit a shop that sells dried fruit, nuts, or
other edibles by the pound. Have them select two different kinds of dried fruit,
nuts, or other edibles and create a mixture problem using this information. For
example, students could create a recipe for trail mix, noting how much of each
ingredient was used, and how much each ingredient cost per pound. Have them
present their problems for the class to solve.
Activity- Have students look into other careers that require knowledge of
creating mixtures such as gardeners and painters. Have them research what skills
and knowledge are needed for these careers. They can present their findings to
the class.