Where are the resources for a collection of linear algebra problems? Are there any resources consisting of a collection of problems on linear algebra for students to practice? I am looking for good interesting problems which test students’ understanding. These questions or examples should be for teaching rather than just testing. The level of difficulty is first year undergraduate. 
 A: If you are looking for graduate level (doesn't sound like it), you can look at this MSE answer.
For undergraduate, there are several book recommendations:


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*3,000 Solved Problems in Linear Algebra by Seymour Lipschutz 

*Schaum's Outline of Linear Algebra, 5th Edition (Schaum's Outlines) Seymour Lipschutz, Marc Lipson

*Linear Algebra: Challenging Problems for Students (Johns Hopkins Studies in the Mathematical Sciences) by Fuzhen Zhang (Author)

*Linear Algebra Problem Solver (REA) The Editors of REA (Author)

*Elementary Linear Algebra - K. Matthews, which is free.

*Too many other books to list (the ones above are probably what you are looking for and very good prices).


*Other MSE book requests links (see right pane of this page) and search for those.
Additional ideas:


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*Open Courseware at places like MIT and other international universities (lectures and notes).

*Browse your college library and look through the books and see if there are other examples that fit the style of writing/examples/problems you like.

*The linear algebra area of Khan Academy.
