A lesson designed to boost math confidence in young girls by framing addition and subtraction within 20 as 'mastermind' skills through a personal field guide and growth mindset strategies.

Tier 2 reteach for standards 4.MD.5, 4.MD.6, & 4.MD.7: Angle measurement with protractors and additive angle properties.

Tier 2 reteach for standard 4.MD.4: Make a line plot to display a data set of measurements in fractions of a unit.

Tier 2 reteach for standard 4.MD.3: Apply the area and perimeter formulas for rectangles.

Tier 2 reteach for standards 4.MD.1 & 4.MD.2: Relative sizes of measurement units and solving word problems involving distance, time, volume, and mass.

Tier 2 reteach for standard 4.G.3: Recognize a line of symmetry for a two-dimensional figure as a line across the figure such that the figure can be folded along the line into matching parts. Identify line-symmetric figures and draw lines of symmetry.

Tier 2 reteach for standard 4.G.2: Classify two-dimensional figures based on the presence or absence of parallel or perpendicular lines, or the presence or absence of angles of a specified size. Recognize right triangles as a category, and identify right triangles.

Tier 2 reteach for standard 4.G.1: Draw points, lines, line segments, rays, angles (right, acute, obtuse), and perpendicular and parallel lines. Identify these in two-dimensional figures.

Tier 2 reteach for standard 4.NF.7: Compare two decimals to hundredths by reasoning about their size.

Tier 2 reteach for standard 4.NF.6: Use decimal notation for fractions with denominators 10 or 100.

Tier 2 reteach for standard 4.NF.5: Express a fraction with denominator 10 as an equivalent fraction with denominator 100, and use this technique to add two fractions with respective denominators 10 and 100.