TY  - JOUR
AU  - Ebrahimi-dolar, Somayeh
TI  - Improving second grade students' understanding of addition and subtraction of three-digit numbers using a technical method (an experiment based on lesson study)
JO  - Transcendent  Education
VL  - 3
IS  - 4
SP  - 107
EP  - 125
PY  - 2024
DO  - 
ER  -