Students build fluency adding whole numbers and fractions using dynamic interactive flashcards, with number line models supporting each problem. Learners flip through cards to practice addition problems, reinforcing procedural fluency alongside conceptual understanding. This activity supports TEKS 4.3.E (add fractions) and aligns with Common Core 4.NF.B.3.
Skills: fraction addition, number line modeling, computation fluency, number sense. Grades 4-8.