Pre-Algebra Problems

A set of problems covering material in a typical junior high first
semester before Algebra I.
Trigonometry Problems

A collection of problems to finish out a course in basic Trigonometry
Various problems involving Sage Embedding

Multivariate Calculus, Linear Algebra and Trigonometry examples which
use aleph.sagemath.org
Remove a few files

I accidentally uploaded a few header files that are not needed in the
OPL
Adding DB tags to previous submission

The tags fit a 6th or 7th grade course for students in middle school
before taking Algebra 1.
Middle School Problems retagged

Now DBsubject is Middle School
Merge pull request #7 from drjt/master

Mississippi College update to OPL