Illustrative Mathematics
Illustrative Mathematics: 6.rp Jim and Jesse's Money
In this real-world context, 6th graders are given the ratio of Jim's money to Jesse's and the amounts they have spent so far on a road trip, and they must calculate what each person had at the start of the trip. Aligns with 6.RP.A.3.
Math Is Fun
Math Is Fun: Internal Rate of Return (Irr)
Explains, with examples, what an internal rate of return is, its uses, and how to calculate it using the net present value.