Some of the topics covered: multiplying and dividing by 10s, 100s or 1000s, word problems, addition and subtraction of unlike fractions, area of a triangle, ratio, finding unknown angles, percent, rate, 4-sided figures, tessellations, volume of a solid.
If you have not used Singapore Math® before please go to Singapore Math® Overview for a complete description, samples, placement guide, and a placement test. US Edition.