A Blended Learning Program Based on the Next Generation Standards (NYS) to Develop the Teaching Performance of Middle School Mathematics Teachers and Some Students’ Future Thinking Skills. jperc [Internet]. 2023 Feb. 13 [cited 2025 May 6];19(74):225-72. Available from: https://jperc.uobaghdad.edu.iq/index.php/jperc/article/view/1324