| Type |  Book |
| ชื่อเรื่อง | Developing essential understanding of ratios, proportions, and proportional reasoning for teaching mathematics in grades 6-8 / Joanne Lobato, Amy B. Ellis |
| ผู้แต่ง | Lobato, Joanne (joanne elizabeth) |
| ISBN | 9780873536226 |
| พิมพลักษณ์ | Reston, VA : National Council of Teachers of Mathematics, c2010 |
| รูปเล่ม | x, 88 p. : ill |
| หัวเรื่อง | Curriculum planning --Standards --United States [] |
| | Mathematics --Study and teaching (Middle school) --Standards --United States [] |
| | Middle school education --Curricula --Standards --United States [] |