A complete 2-week Tier 2 math intervention pack on adding and subtracting fractions, built by a Title I middle-school teacher for 20-30 minute small-group reteach blocks (grades 6-8). What’s inside (16 pages, black-and-white print-friendly): a 1-page teacher guide with a day-by-day reteach routine; a 10-problem diagnostic probe (like denominators, unlike denominators, simplifying, mixed numbers); an error-analysis sheet with error-type codes for grouping students by what they actually missed; 3 reteach mini-lessons at foundational (visual models + like denominators), developing (unlike denominators via LCD), and stretch (mixed numbers + word problems) levels — each with teaching points, worked guided examples, and 6 practice problems; 4 exit tickets (3 problems each); a student progress-monitoring data tracker for MTSS documentation; and full answer keys WITH worked step-by-step solutions for all 46 problems. All problems are original. Aligned to 5.NF.A.1, 5.NF.A.2.