Three IMP Units Available as Stand-alone Student Textbooks Shadows (from Year 1) Solve It! (from Year 2) Fireworks (from Year 3) Many schools that use the Interactive Mathematics Program have asked that these three units be made available as stand-alone texts to allow for more flexibility in planning their programs. Some schools prefer to use Shadows, the last unit of Year 1, as the first unit before they begin Year 2. And some schools find that they can finish Solve It! and Fireworks, the first units of Years 3 and 4, in the last month of the previous year. To give all schools more flexibility, and to allow schools that have not adopted IMP as their core curriculum the opportunity to use these units to supplement their traditional curriculum, Key Curriculum Press has released these three units as stand-alone softcover books.