Grade 3
Liquid Volume and Mass (and continue fact fluency practice)
Unit 12
The Standard
Opening anchor activity
Use with lesson 1
VIP vocabulary milliliter (ml),
liter (L)
3.MD.2 Measure and estimate liquid volumes and masses of objects using standard units of
grams (g), kilograms (kg), and liters (l).1 Add, subtract, multiply, or divide to solve one-step
word problems involving masses or volumes that are given in the same units, e.g., by using
drawings (such as a beaker with a measurement scale) to represent the problem.
BEFORE the video
Borrow a liter box from the science lab. Using unit cubes, longs, flats and a 1000 block
demonstrate the relative sizes by putting things into the liter box first one unit, next one
long, one flat and finally a 1000 cube.
Envision 15-2
and quiz
Metric Units of
Materials: liter bottle and a 4
liter container and another size
or two to use to estimate
classwork and homework
P 15-2
Toss and Talk play whole
class, discuss as you take
each roll of dice
Show the one liter bottle, ask if they think the liter box or the bottle holds more liquid.
Demonstrate by filling the liter box and then pouring it into the bottle. Talk about how the
shapes can be deceiving. A “Fuse” or hourglass shaped Gatorade bottle help make this
Show video
Demo: Tell students bottle has a one liter “capacity”.
How can you estimate the volume of a larger container? About how many of these will this
(another container hold)? How can you check? Fill repeatedly
In Groups or Pairs: Have students work in groups to estimate the capacity of other
containers using the litre bottle
Optional video- measuring volume (2 min 37 sec)
need 2
VIP vocabulary mass, gram (g),
kilogram (kg)
Balance scale
Materials: A dictionary, that
weighs about a kilogram,
classwork and homework
today and tomorrow
P 15-3
Toss and Talk play whole class,
discuss as you take each roll of
may want Balance scales and weights (may
to spend want to do this lesson in the
2 days
science lab)
- Spring or other kinds of scales,
to show (not use)
Objects to weigh like an apple, a
carrot, a book, a box of crayons
Start with the envision clip for vocabulary intro
show this video (time 2:51)
Envision 15-3
Units of Mass
Have kids get a feel for these items: pass around pen, apple, dollar bill, crayons, 2 nickels,
follow with
Show a dictionary, what do you think the mass might be? About 10?
ask what do you think the mass of a typical third grader would be?
Provide scales, ask students to estimate each item you are going to have them weigh. Do all
estimates first. Ask them to defend/justify their estimates. Have groups weigh items,
rotating items through the groups
yesterday we talk about what a third grader might weigh. How about the mass of a
teacher? This video shows reading scales
Toss and Talk boards
-Class & Homework see
Problem Solving
Using Models to represent and
Us the word problems on the enclosed sheet. Work should be done on separate
Envision 15-5
paper. Emphasize labels, units etc. Be sure to have students draw a model or picture Problem
to represent their thinking.

unit 12 volume and mass