Development of a STEM-PJBL-Based Digital Book With Geogebra™ Using the Assure Model to Enhance Students’ Mathematical Literacy in Geometry. jettle [Internet]. 2025 Mar. 31 [cited 2026 Apr. 23];1(1):17-29. Available from: https://journal2.upgris.ac.id/index.php/jettle/article/view/1828