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New Jersey Assessment of Skills and Knowledge (NJ ASK)
Performance Level Descriptors

Mathematics

(February 2009)

Grade 8 Math

Partially Proficient

Students performing at the partially proficient level generally require prompting to demonstrate a basic knowledge of number sense, measuring geometric objects, number patterns, and vertex edge graphs at a limited level of performance.

In general, partially proficient students:

  • Recognize scientific notation and match numbers in scientific notation to their standard notation counterparts
  • Calculate perimeter and area for basic figures or shapes
  • Classify prisms and pyramids according to their bases
  • Identify a sphere and its diameter and radius
  • Recognize and describe a number pattern

Proficient

Students performing at the proficient level may require prompting to demonstrate a basic knowledge of number sense, measuring geometric objects, number patterns, and vertex edge graphs at a moderate level of performance.

In general, proficient students:

  • Convert numbers to scientific notation
  • Order rational numbers (fraction, decimals, integers)
  • Find the area and perimeter of combined shapes
  • Find the surface area of various prisms and pyramids
  • Match surface area and volume to the appropriate model
  • Describe and extend a number pattern
  • Identify a vertex edge graph and its parts

Advanced Proficient

Students performing at the advanced proficient level generally require minimal prompting to demonstrate knowledge of number sense, measuring geometric objects, number patterns, and vertex edge graphs at a high level of performance.

In general, advanced proficient students:

  • Demonstrate the relative magnitude of rational numbers based on their distance from zero
  • Compare and order rational numbers
  • Find and compare the perimeter or area of a figure and its dilation
  • Calculate the volume of three dimensional objects and their dilations and compare the two
  • Find the surface area and volume of a sphere
  • Create a pattern involving integers
  • Follow a path on a vertex edge graph