"Em học Toán, lớp Tư" (I Learn Math, Grade Four), published in 1965 by the Ministry of Culture and Education of the Republic of Vietnam, was an official instructional textbook for Grade 4 of primary school—equivalent to today's Grade 2. The book was compiled with advisory support from American specialists. The main objective of the book is to help students approach mathematics through observation, tangible materials, and hands-on activities, rather than rote memorization. Lessons focus on foundational skills such as counting, measuring, reading numbers, and familiarizing students with everyday units of measurement. The curriculum covers: —Arithmetic: Practice with addition, subtraction, multiplication, and division of numbers up to 999, tied to real-life contexts such as shopping and budgeting. —Measurement: Introduction to units of length (meters), volume (liters), weight (kilograms), and common currency denominations. —Geometry: Recognition of points, lines, angles, squares, and rectangles through illustrated examples. —Drawing: Exercises in freehand drawing of basic geometric shapes to reinforce visual understanding.