Glow Math & Logic · Lesson 01
Repeated rods become groups
Connect the number of groups, group size, and product. Explore a model, explain the relationship, and try it with physical materials.
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Grade 3 Number Trains lessons
Ten Grade 3 lesson drafts for exploring number trains through models, conversation, and hands-on practice. Try three complete free sample lessons. A paid adult account opens all teaching guides, printable PDFs, and learning tools.
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Glow Math & Logic · Lesson 02
Read the same sum two ways
Use an additive model to explain equivalent expressions. Explore a model, explain the relationship, and try it with physical materials.
Number TrainsDiscover
PDF · Paid classroomGlow Math & Logic · Lesson 03
Unknown length in a composite train
Reason about an unknown part of a whole within the rod capacity. Explore a model, explain the relationship, and try it with physical materials.
Number TrainsDiscover
PDF · Paid classroomGlow Math & Logic · Lesson 04
Decompose a group
Show how breaking one group changes a calculation but not its value. Explore a model, explain the relationship, and try it with physical materials.
Number TrainsConnect
PDF · Paid classroomGlow Math & Logic · Lesson 05
Compensation as a proof
Use a preserved total to justify a general additive relationship. Explore a model, explain the relationship, and try it with physical materials.
Number TrainsConnect
PDF · Paid classroomGlow Math & Logic · Lesson 06
What does one more change?
Distinguish changing one unit from adding an entire equal group. Explore a model, explain the relationship, and try it with physical materials.
Number TrainsConnect
PDF · Paid classroomGlow Math & Logic · Lesson 07
An argument about units
Construct a counterargument that names the measured unit. Explore a model, explain the relationship, and try it with physical materials.
Number TrainsConnect
PDF · Paid classroomGlow Math & Logic · Lesson 08
Hide a group in the story
Interpret the same construction as joining and separating quantities. Explore a model, explain the relationship, and try it with physical materials.
Number TrainsStretch
PDF · Paid classroomGlow Math & Logic · Lesson 09
All two-rod representations
Account for the maximum rod length when enumerating solutions. Explore a model, explain the relationship, and try it with physical materials.
Number TrainsStretch
PDF · Paid classroomGlow Math & Logic · Lesson 10
Groups, units, and equations
Compare equal products whose group count and group size exchange roles. Explore a model, explain the relationship, and try it with physical materials.
Number TrainsStretch
PDF · Paid classroom