All of the problems in my multi-grade database of 42,500+ problems are of 4 difficulty levels--level 1 being the simplest and level 4 being the most difficult. These particular problems are ALL of the ones at this level in the various OA Domain standards. They are only for your students who enjoy challenges.
TARGET STUDENTS: gifted classes, gifted individual students, students who want extra challenges, extra credit, end-of-semester challenge, summer camps, math clubs, elective math classes, etc.
[At my school the students in my regular math classes use worksheets that have the problems in difficulty order and I notice that more and more of the students really like to go to the "last problem" to test their own mettle.]
[The problems in All WORKSHEETS and PREVIEWS are printed in difficulty (1 [easy], 2 [not so easy], 3 [proficiency] up to 4 [mastery]) order within a skill. The actual difficulty level appears slightly to the left of the DK box of each problem in a very small font.]
You might also want to check out the Domain Summary
and Gifted/Challenging topics
for the OA Domain.
Also, check out the many other items I have (and will be adding to) for grades through 5--grades covered by the OA Domain.