Curriculum Library

Operations & Algebraic Thinking Unit 2: Represent and Solve Problems

Key Concept: Addition and subtraction can be used to solve join and separate problems.

Lesson Sequences

O.2-1-5 Join and Separate Word Problems: All Unknowns  |
View Teacher-Facilitated Lesson Students solve join and separate word problems with unknowns in various positions.   (35-45 min)
Key Concept: Word problems can have unknowns in various positions.

Lesson Sequences

This topic is still in development.

Key Concept: Addition and subtraction can be used to solve part-part-whole word problems.

Lesson Sequences

O.2-3-4 Part-Part-Whole Word Problems: All Unknowns  |
Lesson Plan
View Lesson Opener Discover & Discuss (5-10 min)
View Guided Lesson Students solve part-part-whole word problems with unknowns in various positions. (12-20 min)
View Lesson Closer Math Musings (5-8 min)
O.2-3-5 Join/Separate/Part-Part-Whole Word Problems  |
Lesson Plan
View Teacher-Facilitated Lesson Students solve join, separate, and part-part-whole word problems with unknowns in various positions. (35-45 min)
Key Concept: Addition and subtraction can be used to solve comparison word problems.

Lesson Sequences

O.2-4-1 Comparison Word Problems: Difference Unknown  |
Lesson Plan
View Teacher-Facilitated Lesson Students solve comparison word problems where the difference is unknown.  (35-45 min)
O.2-4-2 Comparison Word Problems: Quantity Unknown  |
Lesson Plan
View Teacher-Facilitated Lesson Students solve comparison word problems where the compare quantity is unknown.   (35-45 min)
O.2-4-3 Comparison Word Problems: Referent Unknown  |
Lesson Plan
View Teacher-Facilitated Lesson Students solve comparison word problems where the referent is unknown.   (35-45 min)
O.2-4-4 Comparison Word Problems: All Unknowns  |
Lesson Plan
View Teacher-Facilitated Lesson Students solve comparison word problems with unknowns in various positions.    (35-45 min)